mid-13c., "relax a bow by unstringing it," from un- (2) "reverse, opposite of" + bend (v.). Intransitive sense from 1746. Figurative meaning "to become genial, relax" (1748) has a sense opposite to that of unbending "inflexible, obstinate" (1680s), which does not derive from the bow-stringing image.
例文
1. Most professors unbend outside the lecture theatre.
教授は授業の下でたいてい勝手だ。
2.She finds it hard to unbend ,even at parties.
彼女はパーティーでもリラックスしにくいことに気づいた。
3.And the chest strength unbend two arms with the arm department,supports the body.腕と胸の力で両腕を伸ばし、体を支える。
4.He is lying on his back,both hands puts either side,double foot unbend .
彼は仰向けに寝て、両手を両側に置いて、足をまっすぐに伸ばした。
5.To unbend the arm other muscles in the back of the arm have to shorten.