cleanse

Short definition from Wiktionary

Verb

1. 1
   To free from dirt; to clean, to purify.
2. 2
   To spiritually purify; to free from guilt or sin; to purge.
3. 3
   To remove (something seen as unpleasant) from a person, place, or thing.

Noun

1. 1
   An act of cleansing; a purification.