Purge

Noun

 * 1) An act of purging
 * 2)  An evacuation of the bowels or a vomiting.
 * 3) A cleansing of pipes.
 * 4) A forcible removal of people from political activity.
 * Stalin liked to ensure that his purges were not reversible.

Related terms

 * purgatory

Verb

 * 1)   to clean thoroughly; to cleanse; to rid of impurities
 * 2)  to free from sin, guilt, or the burden or responsibility of misdeeds
 * 3)  to void the bowels; to vomit.
 * 4)  to clear of a charge, suspicion, or imputation

Thesaurus
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