Where does “idiocy” come from?

Idiocy comes from French idiotie, from Old French idiot, from Latin idiota, from Ancient Greek ἰδιώτης, ultimately from the Proto-Indo-European root swé meaning self, via Ancient Greek ἴδιος and its suffix -ιος and Proto-Indo-European -yós.

idiocy (English): The state or condition of being an idiot; the...

Definitions

  1. The state or condition of being an idiot; the...

Ancestry of “idiocy”, step by step

StepLanguageWordMeaning
1Frenchidiotieidiocy; nonsense
2French-ieindicates a feminine noun, often an abstract one
3Middle French-ieindicates a feminine noun, often an abstract one
4Old French-ieindicates a feminine noun, often an abstract one
5Latin-iaUsed to form a feminine abstract noun, usually...
6Latin-iusforming adjectives from nouns; nominative neuter...
7Proto-Italic-jōsForms comparative adjectives
8Proto-Indo-European-yósCreates adjectives from noun or verb stems

Words derived from “idiocy

Every word from Proto-Indo-European -yós