to make pure; free from anything that debases, pollutes, adulterates, or contaminates

to purify metals.

to free from foreign, extraneous, or objectionable elements

to purify a language.

to free from guilt or evil.

to clear or purge (usually fol. by of or from ).

to make clean for ceremonial or ritual use.

to become pure.

noun

adulteration , corruption , dirtying , pollution

noun

ablution , absolution , atonement , baptism , bathing , catharsis , depuration , disinfection , distillation , expiation , expurgation , forgiveness , grace , lavation , laving , lustration , purgation , purge , purifying , rarefaction , rebirth , redemption , refinement , regeneration , salvation , sanctification , washing , clarification , cleansing , defecation , freeing