Webster's Revised Unabridged Dictionary · 1913

Cleanse

Cleanse (klenz) , transitive verb

[Anglo-Saxon clansian, from clane clean. See Clean.]

To render clean; to free from filth, pollution, infection, guilt, etc.; to clean.
If we walk in the light... the blood of Jesus Christ his son cleanseth us from all sin. — 1 John i. 7
Can'st thou not minister to a mind diseased, And with some sweet oblivious antidote Cleanse the suffed bosom of that perilous stuff Which weighs upon the heart? — Shakespeare