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The Collaborative International Dictionary
Depurating

Depurate \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.

Wiktionary
depurating

vb. (present participle of depurate English)