EtymologyFrom 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/