cathartic (adj.)youdaoicibaDictYouDict[cathartic 词源字典]
1610s, of medicines, from Latin catharticus, from Greek kathartikos "fit for cleansing, purgative," from katharsis "purging, cleansing" (see catharsis). General sense is from 1670s. Related: Cathartical.[cathartic etymology, cathartic origin, 英语词源]