- [uncountable]
very stupid behaviour; the state of being very stupid 愚蠢行爲；愚昧 It is sheer idiocy to go climbing in this weather. 在這種天氣去爬山簡直是愚蠢。
- [countable]
a very stupid act, remark, etc. 愚蠢的行動（或言論等） the idiocies of bureaucracy 官僚體系所做的蠢事
Word Originearly 16th cent. (originally denoting low intelligence): from idiot, probably on the pattern of pairs such as lunatic, lunacy.