1. (verb) idiot, imbecile, cretin, moron, changeling, half-wit, retard
a person of subnormal intelligence
Synonyms: nitwit, moron, doofus, cretin, dimwit, idiot, changeling, retard, imbecile, half-wit
2. (verb) retard
cause to move more slowly or operate at a slower rate
Synonyms: decelerate, slow down, slow up, check, slow, delay
3. (verb) retard
be delayed
Synonyms: decelerate, slow down, slow up, check, slow, delay
4. (verb) check, retard, delay
slow the growth or development of
Synonyms: checker, check, slow up, slow down, moderate, mark, slow, watch, look into, crack, check up on, arrest, go over, tick off, chink, match, tick, fit, hold back, stop, ascertain, determine, assure, find out, agree, turn back, stay, check into, train, break, control, check off, check out, learn, curb, hold up, hold, see to it, see, chequer, discipline, mark off, tally, ensure, decelerate, hold in, suss out, detain, contain, check over, jibe, condition, retard, delay, correspond, insure, gibe
5. (verb) decelerate, slow, slow down, slow up, retard
lose velocity; move more slowly
Synonyms: decompress, delay, slack, check, unwind, loosen up, slow up, decelerate, unbend, retard, slacken, relax, slow down, slow
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Synonyms and Antonyms of retard 
