Noun

• S: (n) idiot, imbecile, cretin, moron, changeling, half-wit, retard (a person of subnormal intelligence)

Verb

• S: (v) retard (cause to move more slowly or operate at a slower rate) "This drug will retard your heart rate"
• S: (v) retard (be delayed)
• S: (v) check, retard, delay (slow the growth or development of) "The brain damage will retard the child's language development"
• S: (v) decelerate, slow, slow down, slow up, retard (lose velocity; move more slowly) "The car decelerated"
• direct troponym / full troponym
• direct hypernym / inherited hypernym / sister term
• S: (v) 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"
• antonym
• derivationally related form
• sentence frame