ETYM French crétin; of uncertain origin.
1. One afflicted with cretinism.
2. A dolt; a stupid person.
3. Mentally and physically deficient person, generally a large-headed dwarf, whose condition is due to deficient thyroid secretion.

ETYM French idiot, Latin idiota an uneducated, ignorant, ill-informed person, Greek idioths, also and orig., a private person, not holding public office, from idios proper, peculiar. Related to Idiom.
A person of subnormal intelligence; SYN. imbecile, cretin, moron, changeling, half-wit, retard.

ETYM Spanish.
1. A mentally deficient person.
2. An idiot; a stupid person.

Jerk

A fool or idiot.

1. One of feeble mind.
2. An idiot.