unclasp
/ˌʌnˈklɑːsp/verb
with obj.
1- unfasten (a clasp or similar device)解开（扣子等）：
they unclasped their seat belts.
他们解开安全带。
1.1
- release the grip of放开; 松开：
I unclasped her fingers from my hair.
我松开她抓住我头发的手指。