a person of subnormal intelligence

同义词：idiot??/??imbecile??/??cretin??/??moron??/??changeling??/??half-wit

slow the growth or development of

同义词：check??/??delay

cause to move more slowly or operate at a slower rate

be delayed

lose velocity; move more slowly

同义词：decelerate??/??slow??/??slow down??/??slow up