certification (n.)youdaoicibaDictYouDict[certification 词源字典]
early 15c., "notification;" mid-15c., "demonstration, proof," from Medieval Latin certificationem (nominative certificatio), noun of action from past participle stem of Late Latin certificare (see certify). Meaning "act of providing with a legal certificate" is from 1881.[certification etymology, certification origin, 英语词源]