the quality of not being excited, nervous or upset 镇静的;沉着的 He was calmness personified. 他是冷静的化身。
Which Word? calm / calmnesscalm / calmness- The noun calm is usually used to talk about a peaceful time or situation:
There was a short period of uneasy calm after the riot. 动乱之后是令人不安的短暂平静。
She spoke with icy calm. 她说话时一副冷漠、若无其事的样子。
We admired his calmness under pressure. 我们佩服他在压力下的镇静。