1650s in figurative sense, from un- (1) "not" + past participle of ruffle (v.). Literal meaning, in reference to feathers, leaves, etc., is recorded from 1816.
雙語例句
1. Anne had remained unruffled, very cool and controlled.
安妮處亂不驚，十分冷靜沉著。
來自柯林斯例句
2. He remained unruffled by their accusations.
對于他們的指控他處之泰然。
來自《權威詞典》
3. She spoke with unruffled calm.
她從容不迫地講話.
來自《簡明英漢詞典》
4. He remained unruffled by the charges.
他受到這些指控仍處之泰然.
來自《簡明英漢詞典》
5. When coming across complicated problems, he would remain unruffled and take them calmly.