A prefix is placed at the beginning of a word to modify or change its meaning. This is a list of the most common prefixes in English, together with their basic meaning and some examples. You can find more detail or precision for each prefix in any good dictionary. The origins of words are extremely complicated. You should use this list as a guide only, to help you understand possible meanings. But be very careful, because often what appears to be a prefix is not a prefix at all. Note also that this list does not include elements like "auto-" or " bio-", because these are "combining forms", not prefixes.Prefixes
Prefix Meaning Examples a- also an- not, without atheist, anaemic a- to, towards aside, aback in the process of, in a particular state a-hunting, aglow a- of anew completely abashed ab- also abs- away, from abdicate, abstract ad- also a-, ac-, af-, ag- al-, an-, ap-, at- as-, at- movement to, change into, addition or increase advance, adulterate, adjunct, ascend, affiliate, affirm, aggravate, alleviate, annotate, apprehend, arrive, assemble, attend ante- before, preceding antecedent, ante-room anti- also ant- opposing, against, the opposite anti-aircraft, antibiotic, anticlimax, Antarctic be- all over, all around bespatter, beset completely bewitch, bemuse having, covered with bejewelled affect with (added to nouns) befog cause to be (added to adjectives) becalm com- also co-, col-, con-, cor- with, jointly, completely combat, codriver, collude, confide, corrode contra- against, opposite contraceptive counter- opposition, opposite direction counter-attack, counteract de- down, away descend, despair, depend, deduct completely denude, denigrate removal, reversal de-ice, decamp dia- also di- through, across diagonal dis- also di- negation, removal, expulsion disadvantage, dismount, disbud, disbar en- also em- put into or on engulf, enmesh bring into the condition of enlighten, embitter intensification entangle, enrage ex- also e-, ef- out exit, exclude, expand upward exalt, extol completely excruciate, exasperate previous ex-wife extra- outside, beyond extracurricular hemi- half hemisphere hyper- beyond, more than, more than normal hypersonic, hyperactive hypo- under hypodermic, hypothermia in- also il-, im- not, without infertile, inappropriate, impossible also il-, im-, ir- in, into, towards, inside influence, influx, imbibe infra- below infrared, infrastructure inter- between, among interact, interchange intra- inside, within intramural, intravenous non- absence, negation non-smoker, non-alcoholic ob- also oc-, of-, op- blocking, against, concealing obstruct, occult, offend, oppose out- surpassing, exceeding outperform external, away from outbuilding, outboard over- excessively, completely overconfident, overburdened, overjoyed upper, outer, over, above overcoat, overcast peri- round, about perimeter post- after in time or order postpone pre- before in time, place, order or importance pre-adolescent, prelude, precondition pro- favouring, in support of pro-African acting for proconsul motion forwards or away propulsion before in time, place or order prologue re- again repaint, reappraise, reawake semi- half, partly semicircle, semi-conscious sub- also suc-, suf-, sug-, sup-, sur-, sus- at a lower position submarine, subsoil lower in rank sub-lieutenant nearly, approximately sub-tropical syn- also sym- in union, acting together synchronize, symmetry trans- across, beyond transnational, transatlantic into a different state translate ultra- beyond ultraviolet, ultrasonic extreme ultramicroscopic un- not unacceptable, unreal, unhappy, unmanned reversal or cancellation of action or state unplug, unmask under- beneath, below underarm, undercarriage lower in rank undersecretary not enough underdeveloped
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PROFESSOR ILÁZARO FIGUEIREDO
quarta-feira, 13 de maio de 2009
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