Retarded
re·tard·ed
/rəˈtärdəd/
adjective
adjective: retarded
DATED•OFFENSIVE
less advanced in mental, physical, or social development than is usual for one's age.
INFORMAL•OFFENSIVE
very foolish or stupid.
re·tard (you)
Noun / Verb
past tense: retarded; past participle: retarded
late 15th centuryfrench retarder, from Latin retardare, from re- ‘back’ + tardus ‘slow’