
English word eejit comes from Ancient Greek ἴδιος, and later Latin idiota ((pejorative) idiot.)
ἴδιος (Ancient Greek)
ἰδιώτης (Ancient Greek)
idiota (Latin)
(pejorative) idiot.
idiot (Old French)
Ignorant; narrow-minded.
idiot (English)
(uncommon) idiotic, stupid (obsolete, medicine, psychology) A person of the lowest intellectual standing, a person who lacks the capacity to develop beyond the mental age of a normal four-year-old; a person with an IQ below 30.. (pejorative) A person of low general intelligence.
eejit (English)
(Ireland, Scotland, pejorative) An idiot; a fool; an imbecile.