Home › Words › I › idiotnessidiotnessidiotness means synonym of idiocy.EtymologyFrom idiot + -ness.nounSynonym of idiocy.e.g.“'Sorry!' I laughed stupidly, possibly giving away the truth about my idiotness.” — 2013, Tom Clempson, One Seriously Messed-Up Week-End in the Otherwise Un-Messed-Up Life of Jack Samsonite, London: Atom, →ISBN, page 199:Definitions & examples from Wiktionary (CC BY-SA 3.0).