Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun retard

1 sense of retard

Sense 1
idiot, imbecile, cretin, moron, changeling, half-wit, retard -- (a person of subnormal intelligence)
       => simpleton, simple -- (a person lacking intelligence or common sense)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb retard

4 senses of retard

Sense 1
retard -- (cause to move more slowly or operate at a slower rate; "This drug will retard your heart rate")
       => decelerate, slow down -- (reduce the speed of; "He slowed down the car")

Sense 2
retard -- (be delayed)
       => be -- (have the quality of being; (copula, used with an adjective or a predicate noun); "John is rich"; "This is not a good answer")

Sense 3
check, retard, delay -- (slow the growth or development of; "The brain damage will retard the child's language development")
       => change, alter, modify -- (cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue")

Sense 4
decelerate, slow, slow down, slow up, retard -- (lose velocity; move more slowly; "The car decelerated")
       => decrease, diminish, lessen, fall -- (decrease in size, extent, or range; "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper")