Imbecile

/ˈɪm.bə.sɪl/

Synonyms

  • fool
  • dimwit
  • dunce
  • nincompoop
  • simpleton

Slang Meanings

Numbskull
Only a numbskull would try that stunt.
Bonehead
Don't be a bonehead; that idea is terrible.
Blockhead
He felt like a blockhead after realizing his mistake.