depurate
  (vt.)(vi.)(使)清潔,(使)淨化
  dep·u·rate /ˈdɛpjəˌret/ 及物動詞
  Dep·u·rate a.  Depurated; cleansed; freed from impurities.
  Dep·u·rate v. t. [imp. & p. p. Depurated p. pr. & vb. n. Depurating ] To free from impurities, heterogeneous matter, or feculence; to purify; to cleanse.
     To depurate the mass of blood.   --Boyle.
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