Added 9 October 2026 ataraxis noun Categories: FeelingsObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about ataraxis at Wordnik → Where our words come from → The absence of mental stress or anxiety. Related Words: serenitypeacefulnesspeacereposeheartseaseataraxiaataraxynonstressrestquietness Back to today's word