v. undo the ties of
v. cause to become loose
vt. 解开
vi. 松开
1. Please untie your shoelaces before walking indoors.
请在走进室内之前解开你的鞋带。
2. I need to untie the rope to free the boat.
我需要解开绳索来释放船只。
3. She asked him to untie the gift so she could see what was inside.
她请他解开礼物，这样她就可以看看里面是什么。