scaup
clear; free of charge; in vain; pure; white; whiteness【化】 leuco-; leuko-【医】 albo-; leuco-; leuk-; leuko-
bosom; chest; heart; mind; thorax【医】 anocelia; breast; chest; pectus; steth-; stetho-; thoraco-; thorax
duck【机】 bow