動詞 unbend:

1. straighten up or out; make straight
   同義詞：straighten
2. unfasten, as a sail, from a spar or a stay
3. free from flexure
4. make less tight
   同義詞：relax
5. become less tense, rest, or take one's ease
   同義詞：relax, loosen up, unwind, decompress, slow down
6. release from mental strain, tension, or formality

1. She was very formal at first, but then she unbent a little and told a joke.
   她起先顯得很正經(jīng)，但后來變得隨和些，還講了個笑話。
2. Most professors unbend outside the lecture theatre.
   教授在課下大都很隨便。