Idiocy
来自Big Physics
early 16th century (originally denoting low intelligence): from idiot, probably on the pattern of pairs such as lunatic, lunacy .
wiktionary
From French idiotie, from Old French idiot. Displaced earlier idiotacy, idiotry.
etymonline
idiocy (n.)
"state of being an idiot," 1520s, from idiot on model of prophecy, etc. Early alternatives included idiotacy (1580s), idiotry (1590s).
