retard

1. A person of subnormal intelligence (synset 110217144)
   is a type of: simple, simpleton - a person lacking intelligence or common sense
   subtypes: mongoloid - a person suffering from Down syndrome (no longer used technically in this sense, now considered offensive)
   same as: changeling, cretin, half-wit, idiot, imbecile, moron

1. Cause to move more slowly or operate at a slower rate (synset 200439707)
   "This drug will retard your heart rate"
   is a type of: decelerate, slow down - reduce the speed of
   subtypes: deaden - lessen the momentum or velocity of
2. Be delayed (synset 202758442)
   is a type of: be - have the quality of being; (copula, used with an adjective or a predicate noun)
3. Slow the growth or development of (synset 200441241)
   "The brain damage will retard the child's language development"
   is a type of: alter, change, modify - cause to change; make different; cause a transformation
   subtypes:

   • dampen - check; keep in check (a fire)
   • delay, detain, stay - stop or halt
   same as: check, delay
4. Lose velocity;
   Move more slowly (synset 200440913)
   "The car decelerated"
   is a type of: decrease, diminish, fall, lessen - decrease in size, extent, or range
   subtypes:

   • slow, slow down, slow up - cause to proceed more slowly
   • delay, detain, hold up - cause to be slowed down or delayed
   same as: decelerate, slow, slow down, slow up

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