quietude
n. 平静;寂静;沉着
例句
He was often thus when communing with himself on board ship in the quietude of the night.
当他在寂静的夜里在船上自言自语时,他常常是这样。
Quietude is the crown of life.
安静是生命的皇冠。
O rest, in utter quietude of soul.
休息吧,休息在肃静的灵里。