When you hear 'moron' are you hearing English or Greek?

'Moron' is a word borrowed from Greek 'mōros'. The word entered the English language some time around 1910.

moron [noun] [1910]

• a person affected with mild mental retardation
• a very stupid person

See 'moron' on the Loan Words Map

See more loan words from Greek.

Etymology: Irregular from Greek 'mōros' foolish, stupid

See more loan words from 1910s.