平静的,安详的;清澈的,晴朗的. 同义词: calm,tranquil,unagitated. 短释义: Related to the Latin word serenus “peaceful, calm, clear,” serene was originally used in English, as in Latin, to describe calm weather. By the mid 1600s, however, it was used figuratively to describe a calm, untroubled person as well.