cleanse

To free from dirt; to clean, to purify.

An artificial kidney these days still means a refrigerator-sized dialysis machine. Such devices mimic the way real kidneys cleanse blood and eject impurities and surplus water as urine.

To spiritually purify; to free from guilt or sin; to purge.

[T]he famous Ganges: whoſe vnknowne head, pleaſant ſtreames, and long extent, haue amongſt thoſe Heathen Inhabitants, (by the Tradition of their Forefathers) gained a beliefe of clenſing all ſuch ſinnes, as the bodies of thoſe that waſh therein brought with them: [...]

To remove (something seen as unpleasant) from a person, place, or thing.

An act of cleansing; a purification.

I regularly visit the spa for a massage and a facial cleanse.