SynonymDefinitionAntonym.com - English Synonym Dictionary

Reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities

Improve or perfect by pruning or polishing

Treat or prepare so as to put in a usable condition

Attenuate or reduce in vigor, strength, or intensity by polishing or purifying

Make more precise or increase the discriminatory powers of

Make more complex, intricate, or richer