愆ㄑㄧㄢqiān期ㄑㄧˊqí

  1. 誤期、過期。《易經·歸妹卦·九四》：「歸妹愆期，遲歸有時。」《詩經·衛風·氓》：「匪我愆期，子無良媒。」

英(formal)​ to delay, to miss a deadline, to fail to do sth at the appointed time