| Prefijos | Significado | Ejemplos |
a- an-
| not, without | atheist, anemic |
| to, towards | aside, aback |
| in the process of, in a particular state | a-hunting, aglow |
| of | anew |
| ab- abs- | completely | abashed |
| away from | abdicate, abstract |
| ad-, 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- ant- | opposing, against, the opposite | anti-aircraft, antibiotic, anticlimax, Antartic |
| auto- | self | automobile, autobiography |
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 |
| bi- | two | biceps, bicycle |
| com- co-, col-, con-, cor- | with, jointly, completely | combat, co-pilot, colude, 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 |
| downward, undo | deflate, defect |
| deci- | ten | decibels, decimal |
| dia-, di- | throung, across | diagonal |
| dis-, di- | negation, removal, expulsion | disadvantage, dismount, disbud, disbar |
en- em-
| put into or on | engulf, enmesh |
| bring into the condition of | enlighten, embitter |
| intensification | entangle, enrage |
ex, e-, ef-
| out | exit,exclude, expand |
| upward | exalt, extol |
| completeley | 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-, il-, im- | not, without | infertile, inappropriate,impossible, incurable |
| in, into, towards, inside | influence, influx, imbibe |
| infra- | below | infrared, infraestructure |
| inter- | between, among | interact, interchange |
| intra- | inside, within | intramural, intravenous |
| non- | absence, negation | non-smoker, non-alcoholic |
| ob-,oc-, of-, op- | blocking, against, concealing | obstruct, occult, offend, oppose |
| macro- | large | macroeconimics, macrobiotic |
| magni- | great | magnify, magnificent |
| mega- | huge | megaphone, megabucks |
| micro- | small | microscope, micorbe |
| mis- | wrongly | mistake, mislead |
| out- | surpassing, exceeding | outperform |
| external, away from | outbuilding, outboard |
| over- | excessively, completely | overconfident, overburdened, overjoyed |
| 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- | against, opposite | repaint, reappraise, reawake |
| semi- | half, partly | semicircle, semi-conscious |
sub- suc-, suf-, sug-, sup-, sur-sus-
| at a lower position | submarine, subsoil |
| lower in rank | sub-lieutenant |
| nearly, approximately | sub-tropical |
| syn- sym- | in union, acting together | synchronize, symmetry |
| trans- | across, beyond | transnational, transatlantic |
| into a different state | translate |
| tele- | far | telescope, telephone |
| tri- | three | tricycle, triangle |
| ultra- | beyond | ultraviolet, ultrasonic |
| extreme | ultramicroscopic |
| un- | not, without | unacceptable, unreal, unhappy, unmanned |
| reversal or cancellationof action or state | unplug, unmask |
under-
| beneath, below | underage, undercarriage |
| lower in rank | undersecretary |
| not enough | underdeveloped |
| uni- | one, single | unicorn, uniform, unilateral |
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