精炼

精炼	jīng liàn	to refine (a substance) / to purify / to refine (one's skills, writing etc) / refined / polished / succinct / skilled / capable
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)
炼	liàn	to refine; to smelt / to heat or forge (in fire)
炼	liàn	to refine; to temper (variant of 炼) / to polish (wording)