untie

It took several minutes for the sailor to untie the wet, frozen knots on the boat's dock lines.

(Chinese) 水手花了几分钟才解开船只靠岸缆绳上被打湿且冻住的结。

The magician challenged a volunteer to tie him up, then managed to untie himself in under thirty seconds.

(Chinese) 魔术师挑战一名志愿者将他捆绑起来，然后他在三十秒内成功解开了绳索。