disentangle - to get something away from the thing that is twisted around it ("I disentangled the dog from the net") untangle - to separate things that are twisted around each other or something that is tangled around itself ("I untangled the two nets" / "I untangled the net, and then laid it flat") unravel - when you separate the threads/fibers of something - usually that are systematically put together that way ("I unraveled the net, and was left with a pile of threads") All three of these can also be used interchangeably to mean to simply mean to undo something that is knotted or interwoven
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