purify

v. t.

  1. To make pure or clear from material defilement, admixture, or imperfection; to free from extraneous or noxious matter; as, to purify liquors or metals; to purify the blood; to purify the air.
  2. Hence, in figurative uses: (a) To free from guilt or moral defilement; as, to purify the heart.
  3. To free from ceremonial or legal defilement.
  4. To free from improprieties or barbarisms; as, to purify a language.

v. i.

  1. To grow or become pure or clear.