imbecility

English Thesaurus

1. a stupid mistake (noun.act)

hypernym	:	error, fault, mistake,
definition	:	a wrong action attributable to bad judgment or ignorance or inattention (noun.act)

2. retardation more severe than a moron but not as severe as an idiot (noun.cognition)

hypernym	:	backwardness, mental retardation, retardation, slowness, subnormality,
definition	:	lack of normal development of intellectual capacities (noun.cognition)

derivation	:	idiotic, imbecile, imbecilic,
definition	:	having a mental age of three to seven years (adj.all)

derivation	:	idiotic, imbecile, imbecilic,
definition	:	having a mental age of three to seven years (adj.all)