depurate

• And not only I never try'd any Chymical Oyles whose tast was not very manifest and strong; but a skilful and inquisitive person who made it his business by elaborate operations to depurate Chymical Oyles, and reduce them to an Elementary simplicity, Informes us, that he never was able to make them at all Tastless; whence I might inferr, that the proof Chymists confidently give us of a bodies being saline, is so far from demonstrating the Predominancy, that it does not clearly Evince so much as the presence of the saline Principle in it. —  The Sceptical Chymist or Chymico-Physical Doubts & Paradoxes, Touching the Spagyrist's Principles Commonly call'd Hypostatical; As they are wont to be Propos'd and Defended by the Generality of Alchymists. Whereunto is præmis'd Part of another Discourse relating to the same Subject.
• When wine has been kept some time to depurate in wooden vessels, it deposits, on the side of the vessel, a hard crust of dark coloured matter, the taste of which is sour. —  The Mirror of Literature, Amusement, and Instruction Volume 20, No. 568, September 29, 1832

Allen's Synonyms and Antonyms