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SAT Prefixes
| Question | Answer |
|---|---|
| a, ab, abs | away, from, not (abiotic, abnormal) |
| ad, ac, af, ag | to, together, forward (adhere, accord, affect) |
| ante | before, earlier in time (antecedent, "ante up") |
| anti | against (antidote, antisocial) |
| arch | first, original, chief (archetype, archive) |
| bi, bis | two (biped, bisect) |
| circ, circum | around (circle, circumfrence) |
| com, con | together, with (combine, convene) |
| contra, contro | against, opposed (contradict, controversy) |
| de | down, not, opposite to (degrade, demerit) |
| di, dif, dis | apart, not (divide, differ, distract) |
| epi | upon, above (epicenter, epitome) |
| eu | true, honest (euphonious, eulogy) |
| equi | equal, even (equality, equitable) |
| ex, ej | out, from (exit, expel, eject) |
| hyper | above, over (hyperactive, hyperbole) |
| hypo | under, below (hypodermic, hypotonic) |
| in | in, into, within (inject, inside, insight) |
| in, ir | not (incredible, irregular) |
| ill | not (illicit) |
| mal, male | bad, ill (malady, malevolent) |
| mega | large (megabyte, megalith) |
| mis | wrong, bad (mistake, misplace) |
| mono | one, single (monologue, monotone) |
| non | not (nonplused, nonsense) |
| ob | block, against (obstruct, object) |
| omni | all, always (omnipotent, omnibus) |
| per | by means of (persist, perceive) |
| peri | around (periscope, perimeter) |
| poly | many, a lot (polygon, polygraph) |
| post | after, later (postdate, postpone) |
| pre | before, prior to (predict, preface) |
| pro | go forward, support (proceed, promote) |
| re | to do again, repeat (recall, return) |
| retro | backward (retrograde, retrospect) |
| semi | half, part (semiconscious, semicircle) |
| sub | below, under (submerge, subway) |
| syn, sym | together, with (synchronize, symbiotic) |
| super | greater, above (superior, supervisor) |
| trans | to send, to move (transmit, transfer) |
| un | not (unclear, untie) |
| uni | one, singular (unit, unilateral) |