Prefixes

A prefix is a letter or a group of letters attached to the beginning of a word. It partly indicates the meaning of a word. Many prefixes in English have Greek or Latin origin.

SOME COMMON PREFIXES 1. ANTI. Eg anticlimax, antiseptic, anti-aircraft 2. AUTO. Eg autopilot, autobiography, automobile, 3. CO. Eg, co-worker, co-pilot, co-exist, co-author 4. CONTRA. Eg, contradict, contrary, contraband 5. DE. Eg, deactivate, degrade, deforest, devalue 6. DIS. Eg disappear, disagreeable, disadvantage

7. EN. Eg, enclose, enslave, encase, entangle 8. EX. Eg, excavate, extract, ex-president, exhale 9. EXTRA Eg, extramarital, extravagant, extraterrestrial 10. HOMO. Eg, homonym, Homophones, homosexual 11. HYPER. Eg, hypersensitive, hyperbole, hyperactive 12. IL/IM/IN/IR Eg, illegal, immoral, inconsiderate, irresponsible

13. INTER. Eg international, interview, intersect, inter-house 14. MONO. Eg, monologue, monogamy, monopoly 15. PRE. Eg, precede prefix, premarital, prehistoric 16. SUB. Eg, submarine, subsidiary, subway 17. TRI. Eg, tricycle, triangle, trimester 18. UN. Eg, unfinished, unskilled, unfriendly, unruly

19. UNI. Eg, unicorn, unicellular, unit, union 20. POST. Eg, postmortem, posterior, postpone