unwindIf you unwind something that is wrapped around an object, you unfasten it, and if it unwinds, it becomes unfastened.解开，打开，松开(卷绕之物)to unwind a ball of string解开一团绳He unwound his scarf from his neck.他从脖子上解下围巾。The bandage gradually unwound and fell off.绷带逐渐松开脱落了。