精练

精练	jīng liàn	(textiles) to scour / to degum (silk) / variant of 精炼
精	jīng	essence / extract / vitality / energy / semen / sperm / mythical goblin spirit / highly perfected / elite / the pick of sth / proficient (refined ability) / extremely (fine) / selected rice (archaic)
练	liàn	to practice / to train / to drill / to perfect (one's skill) / exercise / (literary) white silk / to boil and scour raw silk