refine
verb
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make more complex, intricate, or richer“refine a design or pattern”elaborate
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make more precise or increase the discriminatory powers of“refine a method of analysis”
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attenuate or reduce in vigor, strength, or validity by polishing or purifying“many valuable nutrients are refined out of the foods in our modern diet”
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improve or perfect by pruning or polishing“refine one's style of writing”down
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reduce to a fine, unmixed, or pure staterectify
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treat or prepare so as to put in a usable condition“refine paper stock”