What is a prefix? A prefix is an affix placed before a base or root to modify meaning. Prefixes are central to English vocabulary, morphology, root words, word formation, spelling, reading comprehension and decoding unfamiliar words. Common prefixes such as un-, re-, dis-, pre-, mis-, inter-, trans-, sub- and anti- can signal negation, repetition, opposition, time, position, direction, number or relationship. Learning prefixes helps students recognise meaningful patterns across thousands of words.
A prefix is not a detachable dictionary definition that works mechanically in every word. English has developed through multiple languages and centuries of sound and spelling change, and the same written prefix can carry several related functions. Good prefix knowledge therefore combines morphology with root meaning, grammar, collocation and sentence context. The prefix supplies evidence; the complete word and its context determine the actual meaning.
This eduKateSG apex guide grows directly from What Are Root Words? and connects to Vocabulary, the Vocabulary Learning Hub, multiple-meaning words and commonly confused words. The goal is productive morphological awareness: seeing a new word, analysing its meaningful parts, predicting intelligently, checking context and remembering the word as part of a family.
The 50-second answer
A prefix is a meaningful affix added to the beginning of a base. In rewrite, re- contributes the idea of again; in unhappy, un- contributes negation; in preview, pre- contributes the idea of before. To decode a new word, identify a plausible prefix, identify the remaining base, combine their meaning cues, check the sentence, and verify if necessary.
1. Prefix meaning and definition
Prefix meaning and definition becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
2. Prefixes and affixes
Prefixes and affixes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
3. Prefixes versus roots
Prefixes versus roots becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
4. Prefixes versus suffixes
Prefixes versus suffixes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
5. Bound morphemes
Bound morphemes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
6. How prefixes modify meaning
How prefixes modify meaning becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
7. Negative prefixes
Negative prefixes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
8. Reversal prefixes
Reversal prefixes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
9. Repetition
Repetition becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
10. Time and sequence
Time and sequence becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
11. Position
Position becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
12. Direction
Direction becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
13. Number
Number becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
14. Quantity and scale
Quantity and scale becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
15. Relationship
Relationship becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
16. Opposition
Opposition becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
17. Degree and intensity
Degree and intensity becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
18. Scientific prefixes
Scientific prefixes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
19. Metric prefixes
Metric prefixes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
20. Greek-derived prefixes
Greek-derived prefixes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
21. Latin-derived prefixes
Latin-derived prefixes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
22. Native English prefixes
Native English prefixes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
23. Assimilation and spelling variants
Assimilation and spelling variants becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
24. In-, im-, il- and ir-
In-, im-, il- and ir- becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
25. Ad-, ac-, af-, ag-, al- and ap-
Ad-, ac-, af-, ag-, al- and ap- becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
26. Com-, con-, col- and cor-
Com-, con-, col- and cor- becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
27. Hyphens with prefixes
Hyphens with prefixes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
28. Closed and open forms
Closed and open forms becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
29. Capital letters and proper names
Capital letters and proper names becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
30. Prefix ambiguity
Prefix ambiguity becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
31. False prefix identification
False prefix identification becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
32. Meaning change
Meaning change becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
33. Word families
Word families becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
34. Morphological trees
Morphological trees becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
35. Decoding unfamiliar vocabulary
Decoding unfamiliar vocabulary becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
36. Context clues
Context clues becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
37. Dictionary verification
Dictionary verification becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
38. Spelling
Spelling becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
39. Reading comprehension
Reading comprehension becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
40. Academic vocabulary
Academic vocabulary becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
41. Science vocabulary
Science vocabulary becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
42. Mathematics vocabulary
Mathematics vocabulary becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
43. Humanities vocabulary
Humanities vocabulary becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
44. Writing
Writing becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
45. Editing
Editing becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
46. Retrieval practice
Retrieval practice becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
47. Spaced review
Spaced review becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
48. Teaching prefixes
Teaching prefixes becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
49. The central rule
The central rule becomes useful when learners treat a prefix as one source of semantic evidence. First identify whether the opening letters genuinely function as a prefix in that word. Then determine what the remaining base contributes. Combine the clues provisionally and ask whether the resulting meaning fits the word’s grammatical role and the surrounding sentence. This prevents confident but false segmentation.
Prefixes are especially powerful because one pattern can unlock a family of words. Yet a short gloss such as “not,” “before” or “across” is only a starting point. Historical development, specialised usage and lexicalisation can make the modern whole less predictable. A mature learner distinguishes productive patterns from words whose meanings must be learned more specifically.
Practise in both directions. Given a prefix, generate genuine examples and explain its contribution. Given an unfamiliar word, locate a plausible prefix and infer a broad meaning. Then remove the context and retrieve the meaning later. Finally use the word in an original sentence. This sequence moves from recognition to analysis, retrieval and productive transfer.
100 high-value English prefixes
1. un- — not or reverse
un- commonly contributes the meaning cue not or reverse. Examples include unhappy, unfair, unlock, untie. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around un-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
2. re- — again or back
re- commonly contributes the meaning cue again or back. Examples include rewrite, rebuild, return, reconsider. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around re-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
3. dis- — not, apart or reverse
dis- commonly contributes the meaning cue not, apart or reverse. Examples include disagree, disconnect, dislike, disappear. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around dis-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
4. in- — in, into or not
in- commonly contributes the meaning cue in, into or not. Examples include insert, invade, inactive, indirect. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around in-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
5. im- — in, into or not
im- commonly contributes the meaning cue in, into or not. Examples include import, immerse, impossible, impatient. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around im-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
6. il- — not
il- commonly contributes the meaning cue not. Examples include illegal, illogical, illegible. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around il-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
7. ir- — not
ir- commonly contributes the meaning cue not. Examples include irregular, irresponsible, irrelevant. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around ir-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
8. non- — not
non- commonly contributes the meaning cue not. Examples include nonfiction, nonstop, nonverbal, nonessential. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around non-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
9. mis- — wrongly or badly
mis- commonly contributes the meaning cue wrongly or badly. Examples include misread, misunderstand, misplace, misjudge. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around mis-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
10. pre- — before
pre- commonly contributes the meaning cue before. Examples include preview, preheat, prehistoric, prerequisite. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around pre-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
11. post- — after
post- commonly contributes the meaning cue after. Examples include postwar, postgraduate, postscript, postnatal. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around post-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
12. anti- — against
anti- commonly contributes the meaning cue against. Examples include antibody, antisocial, antibiotic, anticlockwise. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around anti-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
13. pro- — forward or in favour of
pro- commonly contributes the meaning cue forward or in favour of. Examples include proceed, promote, proactive, proponent. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around pro-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
14. de- — down, away or reverse
de- commonly contributes the meaning cue down, away or reverse. Examples include deactivate, defrost, descend, devalue. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around de-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
15. over- — too much or above
over- commonly contributes the meaning cue too much or above. Examples include overcook, overestimate, overhead, overconfident. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around over-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
16. under- — too little or below
under- commonly contributes the meaning cue too little or below. Examples include underpay, underestimate, underground, underdeveloped. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around under-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
17. sub- — under or below
sub- commonly contributes the meaning cue under or below. Examples include submarine, subsoil, subsection, subordinate. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around sub-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
18. super- — above or beyond
super- commonly contributes the meaning cue above or beyond. Examples include superstructure, supervise, superhuman, superimpose. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around super-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
19. inter- — between or among
inter- commonly contributes the meaning cue between or among. Examples include interact, international, intersect, interdependent. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around inter-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
20. intra- — within
intra- commonly contributes the meaning cue within. Examples include intracellular, intravenous, intrapersonal, intramural. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around intra-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
21. trans- — across or through
trans- commonly contributes the meaning cue across or through. Examples include transport, transform, transcontinental, transatlantic. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around trans-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
22. extra- — outside or beyond
extra- commonly contributes the meaning cue outside or beyond. Examples include extracurricular, extraordinary, extraterrestrial. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around extra-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
23. ultra- — beyond or extreme
ultra- commonly contributes the meaning cue beyond or extreme. Examples include ultraviolet, ultramodern, ultrasound. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around ultra-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
24. infra- — below or beneath
infra- commonly contributes the meaning cue below or beneath. Examples include infrared, infrastructure, infrasonic. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around infra-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
25. circum- — around
circum- commonly contributes the meaning cue around. Examples include circumference, circumnavigate, circumstance, circumvent. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around circum-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
26. peri- — around
peri- commonly contributes the meaning cue around. Examples include perimeter, periscope, peripheral, periodontal. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around peri-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
27. ex- — out or former
ex- commonly contributes the meaning cue out or former. Examples include export, exhale, exclude, ex-president. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around ex-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
28. en- — cause to be or put into
en- commonly contributes the meaning cue cause to be or put into. Examples include enable, enrich, encircle, endanger. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around en-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
29. em- — cause to be or put into
em- commonly contributes the meaning cue cause to be or put into. Examples include empower, embody, embed, embrace. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around em-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
30. co- — together or jointly
co- commonly contributes the meaning cue together or jointly. Examples include cooperate, coexist, coauthor, coworker. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around co-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
31. com- — together or with
com- commonly contributes the meaning cue together or with. Examples include combine, compress, communicate, compare. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around com-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
32. con- — together or with
con- commonly contributes the meaning cue together or with. Examples include connect, converge, contain, construct. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around con-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
33. col- — together or with
col- commonly contributes the meaning cue together or with. Examples include collaborate, collect, collide, colleague. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around col-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
34. cor- — together or with
cor- commonly contributes the meaning cue together or with. Examples include correspond, correlate, correct. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around cor-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
35. ad- — to or toward
ad- commonly contributes the meaning cue to or toward. Examples include adapt, adhere, adjoin, advance. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around ad-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
36. ac- — to or toward
ac- commonly contributes the meaning cue to or toward. Examples include accept, access, acclaim, accompany. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around ac-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
37. af- — to or toward
af- commonly contributes the meaning cue to or toward. Examples include affix, affirm, affiliate. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around af-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
38. ag- — to or toward
ag- commonly contributes the meaning cue to or toward. Examples include aggravate, aggregate, aggression. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around ag-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
39. al- — to or toward
al- commonly contributes the meaning cue to or toward. Examples include allocate, ally, alleviate. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around al-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
40. ap- — to or toward
ap- commonly contributes the meaning cue to or toward. Examples include appear, appoint, apply, approve. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around ap-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
41. ab- — away from
ab- commonly contributes the meaning cue away from. Examples include absent, abduct, abstract, abnormal. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around ab-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
42. a- — not or without
a- commonly contributes the meaning cue not or without. Examples include amoral, atypical, asymmetrical, apolitical. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around a-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
43. bi- — two
bi- commonly contributes the meaning cue two. Examples include bicycle, bilingual, bilateral, bimonthly. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around bi-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
44. tri- — three
tri- commonly contributes the meaning cue three. Examples include triangle, tricycle, trilogy, trimester. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around tri-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
45. quad- — four
quad- commonly contributes the meaning cue four. Examples include quadrilateral, quadrant, quadruple, quadruped. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around quad-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
46. penta- — five
penta- commonly contributes the meaning cue five. Examples include pentagon, pentathlon, pentameter. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around penta-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
47. hexa- — six
hexa- commonly contributes the meaning cue six. Examples include hexagon, hexadecimal, hexapod. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around hexa-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
48. hepta- — seven
hepta- commonly contributes the meaning cue seven. Examples include heptagon, heptathlon, heptarchy. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around hepta-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
49. oct- — eight
oct- commonly contributes the meaning cue eight. Examples include octagon, octopus, octave, octet. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around oct-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
50. deca- — ten
deca- commonly contributes the meaning cue ten. Examples include decade, decagon, decathlon, decalogue. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around deca-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
51. centi- — one hundredth
centi- commonly contributes the meaning cue one hundredth. Examples include centimetre, centigram, centilitre. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around centi-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
52. milli- — one thousandth
milli- commonly contributes the meaning cue one thousandth. Examples include millimetre, milligram, millisecond. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around milli-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
53. kilo- — one thousand
kilo- commonly contributes the meaning cue one thousand. Examples include kilometre, kilogram, kilowatt. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around kilo-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
54. mega- — large or million
mega- commonly contributes the meaning cue large or million. Examples include megabyte, megawatt, megacity, megaproject. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around mega-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
55. giga- — billion
giga- commonly contributes the meaning cue billion. Examples include gigabyte, gigawatt, gigahertz. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around giga-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
56. micro- — small or millionth
micro- commonly contributes the meaning cue small or millionth. Examples include microscope, microchip, microsecond, microorganism. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around micro-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
57. macro- — large-scale
macro- commonly contributes the meaning cue large-scale. Examples include macroeconomics, macrostructure, macroscopic, macrotrend. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around macro-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
58. mini- — small
mini- commonly contributes the meaning cue small. Examples include minibus, miniskirt, miniseries, miniature. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around mini-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
59. multi- — many
multi- commonly contributes the meaning cue many. Examples include multilingual, multimedia, multicultural, multinational. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around multi-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
60. poly- — many
poly- commonly contributes the meaning cue many. Examples include polygon, polyglot, polymer, polytheism. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around poly-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
61. mono- — one
mono- commonly contributes the meaning cue one. Examples include monologue, monochrome, monorail, monolingual. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around mono-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
62. uni- — one
uni- commonly contributes the meaning cue one. Examples include unicycle, unilateral, uniform, unify. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around uni-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
63. semi- — half or partly
semi- commonly contributes the meaning cue half or partly. Examples include semicircle, semifinal, semiconscious, semidetached. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around semi-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
64. hemi- — half
hemi- commonly contributes the meaning cue half. Examples include hemisphere, hemicycle, hemiplegia. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around hemi-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
65. demi- — half or partly
demi- commonly contributes the meaning cue half or partly. Examples include demigod, demitasse, demisemiquaver. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around demi-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
66. auto- — self
auto- commonly contributes the meaning cue self. Examples include autobiography, automatic, autonomous, automobile. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around auto-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
67. bio- — life
bio- commonly contributes the meaning cue life. Examples include biography, biology, biodegradable, biosphere. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around bio-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
68. geo- — earth
geo- commonly contributes the meaning cue earth. Examples include geography, geology, geothermal, geopolitics. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around geo-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
69. hydro- — water
hydro- commonly contributes the meaning cue water. Examples include hydroelectric, hydrology, hydrosphere, hydrotherapy. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around hydro-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
70. thermo- — heat
thermo- commonly contributes the meaning cue heat. Examples include thermometer, thermostat, thermodynamics, thermonuclear. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around thermo-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
71. photo- — light
photo- commonly contributes the meaning cue light. Examples include photograph, photosynthesis, photocopy, photoreceptor. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around photo-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
72. tele- — far or distance
tele- commonly contributes the meaning cue far or distance. Examples include telephone, television, telescope, telemedicine. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around tele-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
73. audio- — sound or hearing
audio- commonly contributes the meaning cue sound or hearing. Examples include audiobook, audiovisual, audiology, audiometer. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around audio-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
74. electro- — electricity
electro- commonly contributes the meaning cue electricity. Examples include electromagnet, electrochemical, electrocardiogram. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around electro-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
75. neo- — new or revived
neo- commonly contributes the meaning cue new or revived. Examples include neoclassical, neonatal, neologism, neoliberal. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around neo-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
76. paleo- — ancient
paleo- commonly contributes the meaning cue ancient. Examples include paleontology, Paleolithic, paleoclimate, paleography. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around paleo-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
77. pseudo- — false or imitation
pseudo- commonly contributes the meaning cue false or imitation. Examples include pseudonym, pseudoscience, pseudocode, pseudo-intellectual. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around pseudo-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
78. quasi- — seemingly or partly
quasi- commonly contributes the meaning cue seemingly or partly. Examples include quasi-legal, quasi-scientific, quasi-independent. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around quasi-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
79. counter- — against or opposite
counter- commonly contributes the meaning cue against or opposite. Examples include counterargument, counterattack, counteract, counterexample. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around counter-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
80. fore- — before or front
fore- commonly contributes the meaning cue before or front. Examples include forecast, foresee, foreword, foreground. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around fore-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
81. mid- — middle
mid- commonly contributes the meaning cue middle. Examples include midday, midpoint, midterm, midweek. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around mid-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
82. out- — beyond or more than
out- commonly contributes the meaning cue beyond or more than. Examples include outperform, outnumber, outgrow, outlive. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around out-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
83. up- — upward or improved
up- commonly contributes the meaning cue upward or improved. Examples include upgrade, uplift, update, upscale. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around up-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
84. down- — downward or reduced
down- commonly contributes the meaning cue downward or reduced. Examples include download, downgrade, downturn, downsize. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around down-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
85. back- — backward or previous
back- commonly contributes the meaning cue backward or previous. Examples include backtrack, background, backup, backdate. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around back-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
86. cross- — across
cross- commonly contributes the meaning cue across. Examples include cross-border, cross-cultural, cross-reference, cross-section. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around cross-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
87. self- — oneself
self- commonly contributes the meaning cue oneself. Examples include self-control, self-aware, self-esteem, self-study. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around self-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
88. vice- — deputy or in place of
vice- commonly contributes the meaning cue deputy or in place of. Examples include vice-president, vice-chair, viceroy. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around vice-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
89. arch- — chief or principal
arch- commonly contributes the meaning cue chief or principal. Examples include archbishop, archenemy, archduke. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around arch-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
90. proto- — first or original
proto- commonly contributes the meaning cue first or original. Examples include prototype, protohistory, proto-language. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around proto-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
91. meta- — beyond or about itself
meta- commonly contributes the meaning cue beyond or about itself. Examples include metadata, metacognition, meta-analysis, metafiction. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around meta-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
92. para- — beside, beyond or related
para- commonly contributes the meaning cue beside, beyond or related. Examples include paragraph, paramedic, paranormal, parallel. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around para-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
93. syn- — together
syn- commonly contributes the meaning cue together. Examples include synthesis, synchronize, synonym, syntax. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around syn-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
94. dia- — through or across
dia- commonly contributes the meaning cue through or across. Examples include diameter, dialogue, diagnosis, diagram. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around dia-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
95. epi- — upon or over
epi- commonly contributes the meaning cue upon or over. Examples include epidermis, epicentre, epilogue, epidemic. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around epi-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
96. hyper- — over or excessive
hyper- commonly contributes the meaning cue over or excessive. Examples include hyperactive, hypersensitive, hypertension, hyperlink. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around hyper-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
97. hypo- — under or below
hypo- commonly contributes the meaning cue under or below. Examples include hypothermia, hypothesis, hypoglycaemia, hypodermic. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around hypo-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
98. endo- — within
endo- commonly contributes the meaning cue within. Examples include endoskeleton, endocrine, endothermic, endoscope. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around endo-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
99. exo- — outside
exo- commonly contributes the meaning cue outside. Examples include exoskeleton, exosphere, exothermic, exoplanet. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around exo-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
100. intro- — inward or within
intro- commonly contributes the meaning cue inward or within. Examples include introduce, introspection, introvert, introductory. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around intro-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
101. retro- — backward or past
retro- commonly contributes the meaning cue backward or past. Examples include retrospect, retroactive, retrofit, retrograde. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around retro-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
102. ante- — before
ante- commonly contributes the meaning cue before. Examples include antecedent, antenatal, antechamber, antedate. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around ante-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
103. contra- — against
contra- commonly contributes the meaning cue against. Examples include contradict, contraindicate, contravene, contraposition. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around contra-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
104. ob- — against or toward
ob- commonly contributes the meaning cue against or toward. Examples include obstruct, oppose, object, occur. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around ob-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
105. per- — through or thoroughly
per- commonly contributes the meaning cue through or thoroughly. Examples include permeate, persist, perceive, perfect. The cue helps generate a hypothesis, but the complete word may have a specialised meaning. Analyse the base as well as the prefix and test the combined interpretation against context.
Build a family around per-. Sort examples by the particular sense of the prefix if it has more than one. For each word, identify the base, define the whole word in plain English and explain exactly what the prefix contributes. If a word only looks as though it contains this prefix, keep it out of the family; accurate segmentation matters more than producing a long list.
For transfer, take an unfamiliar member of the family and predict its broad meaning before checking a dictionary. Then compare prediction with the verified definition. If the prediction is only partly correct, identify why: the base may have an unfamiliar sense, the prefix may carry another function, or the whole word may have developed a specialised meaning. This correction process is part of vocabulary growth.
A 12-week prefix mastery programme
Week 1
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Week 2
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Week 3
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Week 4
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Week 5
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Week 6
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Week 7
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Week 8
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Week 9
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Week 10
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Week 11
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Week 12
Choose six to eight prefixes and build compact word families. Establish the main meaning cue, analyse familiar examples, then infer unfamiliar examples in sentences. On later sessions, mix prefixes with roots and suffixes so learners must segment whole words rather than respond to isolated cards. Include spelling, comprehension and original writing tasks to force transfer across contexts.
Measure mastery by analysis and use. A learner should recognise the prefix, explain its contribution without treating the gloss as an exact definition, distinguish it from look-alike letter sequences, infer plausible meanings and verify uncertain cases. Revisit confusing prefixes through spaced practice and direct comparison.
Frequently asked questions
What is a prefix?
An affix added before a base or root to modify meaning.
What are common prefixes?
Examples include un-, re-, dis-, pre-, mis-, inter-, sub-, trans-, anti- and non-.
What is the difference between a prefix and suffix?
A prefix occurs before a base; a suffix occurs after it.
Does a prefix change a word’s part of speech?
It often changes meaning while preserving category, but English word formation is varied and should be checked word by word.
Why do in-, im-, il- and ir- look different?
They can represent historically related forms whose shape adapts to neighbouring sounds in many words.
Can I always decode a word from its prefix?
No. Prefix analysis provides clues, but lexical meaning and context can be less predictable.
Do prefixes use hyphens?
Some constructions do and conventions vary by word and style; check a current dictionary when uncertain.
How should students learn prefixes?
Learn meaning cues through word families, analyse real words, infer in context, verify definitions and retrieve the patterns over time.
Continue through the eduKate vocabulary system
Continue with What Are Root Words?, What Are Commonly Confused Words?, What Are Multiple-Meaning Words?, the Vocabulary hub and Vocabulary Learning Hub.