| A | B |
|---|
| anti- & ant- (antifreeze, antisocial) | against; opposite, reverse |
| contra- & counter- (contradict, counterclockwise) | against; opposite |
| de- (descend, deflate, depart, detach, destruction) | down; opposite of; away from; undo |
| dis- (disagree, dissappear, discontinue, disrespect) | not, opposite; lack of |
| em- & en- (employ, embrace, encourage, enjoy) | in, into, with; cause to be |
| epi- (episode, epidemic, epicenter) | on, over, or outside |
| in- & im- (inject, infield, inhale, import, implant) | in or into |
| inter-(intersect, intermission) | between, among |
| ob- & of- (obstacle, obstruction, offend, offensive) | against |
| pre- (pretest, pregame, preschool, preheat) | before; toward |
| re- (retest, redo, reverse, reflect) | back, again |
| sub- (submarine, submerge, substitute) | under, below/beneath; less than |
| super- & supr- & sur- (superintendent, supreme, survivor, surface) | over, above; more than |
| trans- (transport, transmit, transcend) | across, over; change |
| un- (unknown, unhappy, upack, unload, unlock) | not; opposite of, release |
| il- im- in- ir- (illegal, immature, inaccurate, irresponsible) | not |
| fore- (forearm, foresee, forecast, forethoughts, forewarn) | before in time, place, order or rank; the front part of |
| post- (postscript, postpone, postmortem) | after, behind |
| para- (parallel, paralysis) | beside, beyond |
| non- (nonsense, nonfiction, nonstick, nonviolent) | not |
| mis- (mistake, misread, misbehave, mistrust) | not; wrong, bad |
| over- (overtime, overweight, oversight, overextend) | too much, extra, beyond the normal |
| semi- (semicirclee, semipro, semiautomatic) | half, partly |
| under- (undersea, underground, underwear, underpaid) | below, beneath; too little, not enough |
| med- mid- medi- (medium, midwife, midnight, midway) | middle |
|
