Cleanse

[Sarah]

To render clean; to free from fith, pollution, infection,guilt, etc.; to clean.If we walk in the light . . . the blood of Jesus Christ his soncleanseth us from all sin. 1 John i. 7.Can'st thou not minister to a mind diseased, And with some sweetoblivious antidote Cleanse the suffed bosom of that perilous stuffWhich weighs upon the heart Shak.

[Couch Potatoe]

to make something completely clean:

[Kit]

Make (something, especially the skin) thoroughly clean.