imbecile
1. [ noun ] a person of subnormal intelligence
Synonyms: idiot changeling moron half-wit retard cretin
Related terms: simpleton check
2. [ adjective ] having a mental age of three to seven years
Synonyms: idiotic imbecilic
Related terms: unintelligent
Similar spelling:   imbecilic
  impeccable
  imbecility
  impeach
  impeachment