V-ERG
解开；展开
If you unwind a length of something that is wrapped round something else or round itself, you loosen it and make it straight. You can also say that it unwinds .
例句
One of them unwound a length of rope from around his waist...
其中一人把绑在腰间的一条绳子解下来。
The thread unwound a little more.
线又松开了一些。