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“refine” in Latin

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

refine
PROP., defaecare (e.g., vinum): liquare: eliquare: deliquare (of liquids). to refine sugar, *saccharum coquere.
Figuratively, expolire: perpolire: excolere. Refined habits, etc., politior humanitas: refined life, cultus; vitae cultus: refined luxury, eruditus luxus (Tac., Ann., 16, 18).

Quick answer

What is the Latin word for refine?
The usual Latin words for “refine” are dēfaecō, liquō, dēliquō; also expoliō, perpoliō, excolō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.