词根：cathar = pure （纯洁）

cathartic n. 泻药

catharsis v. 导泻；精神发泄

词根词缀：cathar-, cathart-, cathars-

【来源及含义】Greek: to purge, to purify, or to cleanse; purification; cleansing

【同源单词】acatharsia, Catharist, catharsis, cathartic, cathartical, Catherine