e·qua·nim·i·ty (n)/ˌekwəˈnimədē/ mental calmness, composure, and evenness of temper, especially in a difficult situation. "she accepted both the good and the bad with equanimity" synonyms: composure, calm, level-headedness, self-possession, coolheadedness, presence of mind; More antonyms: anxiety

Etymology From Anglo-Norman cotidian, cotidien, Middle French cotidian, cotidien, and their source, Latin cottīdiānus, quōtīdiānus (“happening every day”), from adverb cottīdiē, quōtīdiē (“every day, daily”), from an unattested adjective derived from quot (“how many”) + locative form of diēs (“day”). Pronunciation[edit] (UK) IPA(key): /kwəˈtɪdɪən/ (US) IPA(key): /kwɵˈtɪdɪən/