Added 10 October 2026 impassiveness noun Categories: FeelingsObscure Words noun ! Definition from Wiktionary (CC BY-SA). More about impassiveness at Wordnik → Where our words come from → The state of being impassive. Related Words: indifferenceemotionlessnessunemotionalitystolidityphlegmunpassionpassivitypassionlessnessstoicismdispassionathymiainertness Back to today's word