Word
unfastening
/ʌnˈfæsənɪŋ/
verb
解开，松开（如纽扣、拉链或结）
to cause something to become undone, such as a button, zipper, or knot
常指解开衣物或带子
- 1.
n loosening the ties that fasten something; the untying is easy"；v cause to become undone；v become undone or untied
解开(尤指衣服或带子)( unfasten的现在分词 ); 松开; 解开；脱开
（自己）松开，解开；解开(尤指衣服或带子)( unfasten的现在分词 ); 松开; 解开；脱开；松开
In use
She was unfastening her necklace when it slipped and fell.
Unfastening the seatbelt can be tricky if you're in a hurry.
He kept unfastening and refastening the button nervously.
unfasten something
及物用法，宾语常为衣服、带子等需要解开的东西。
He is unfastening the buttons on his shirt.
他正在解开衬衫上的纽扣。
something unfastens
不及物用法，表示物体自行松开。
The zipper is unfastening by itself.
拉链自己松开了。
the unfastening of something
名词用法，表示解开的过程或动作。
The unfastening of the rope took only a few seconds.
Connections
Learner notes
Grammar Note
作名词时表示‘解开’的动作或过程，不可数；作动词时为 unfasten 的现在分词
Dictionary facts from ECDICT.