Cathar (n.)youdaoicibaDictYouDict[Cathar 词源字典]
1570s, "religious puritan" (implied in Catharism), from Medieval Latin Cathari "the Pure," name taken by Novatians and other Christian sects, from New Testament Greek katharizein "to make clean," from Greek katharos "pure." Related: Catharist.[Cathar etymology, Cathar origin, 英语词源]