refine (suomeksi)

jalostaa (v: raaka-ainetta / to reduce to a fine, unmixed, or pure state; to free from impurities; to free from dross or alloy / to purify from what is gross, coarse, vulgar, inelegant, low, and the like; to make elegant or excellent; to polish / to improve in accuracy, delicacy, or excellence / to affect nicety or subtlety in thought or language)
puhdistaa (v: to reduce to a fine, unmixed, or pure state; to free from impurities; to free from dross or alloy)
kehittää (v: to purify from what is gross, coarse, vulgar, inelegant, low, and the like; to make elegant or excellent; to polish / to improve in accuracy, delicacy, or excellence)
jalostua (v: to become pure; to be cleared of feculent matter)
hioa (v: to affect nicety or subtlety in thought or language)