cathˈarize or cathˈarise transitive verb

1. To render absolutely clean
2. To purge

catharˈsis noun (pl catharˈses /-sēz/)

1. Purification
2. Evacuation of the bowels
3. Purification of the emotions, achieved, according to Aristotle, through the witnessing of theatrical tragedy
4. The purging of the effects of pent-up emotion and repressed thoughts, by bringing them to the surface of consciousness (psychology)

cathartˈically adverb