English
idiocity
From idiocy + -ity.
Formed from idiocy + -ity
Proto-Indo-European *swé ‘self’
…
Ancient Greek ἰδιώτης ‘layman’
Latin idiōta ‘idiot, an ignorant, uneducated or illiterate…’
Old French idiot ‘ignorant’
French idiotie
English idiocy
Today it means
noun Idiocy.
Language periods are conventional ranges, not dates for this word.
Etymograph / idiocity