refine
verb
°To reduce to a fine, unmixed, or pure state; to free from impurities; to free from dross or alloy; to separate from extraneous matter; to purify; as, to refine gold or silver; to refine iron; to refine wine or sugar.
°To purify from what is gross, coarse, vulgar, inelegant, low, and the like; to make elegant or excellent; to polish; as, to refine the manners, the language, the style, the taste, the intellect, or the moral feelings.