re·fine 
(rĭ-fīn)
(rĭ-fīn)v. re·fined, re·fin·ing, re·fines
v.tr.
1. To reduce to a pure state; purify.
2. To remove by purifying.
3. To free from coarse, unsuitable, or immoral characteristics: refined his manners; refined her speaking style.
v.intr.
1. To become free of impurities.
2. To acquire polish or elegance.
3. To use precise distinctions and subtlety in thought or speech.
re·finer n.