refine

v. (-ning) 1 free from impurities or defects. 2 make or become more polished, elegant, or cultured.

v. t. 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; to defecate; as, to refine gold or silver; to refine iron; to refine wine or sugar.