calmness
/ˈkɑːmnəs/ 58Calmness is the mental state of peace of mind, being free from agitation, excitement, or disturbance.
noun [抽象名词]冷静,镇静;平静,安宁
He felt the strange calmness stealing over him and it grew deeper and deeper until he fell asleep. 他感到一种奇怪的平静悄悄笼罩着他,这种平静越来越强烈,直到他睡着了。