\Un*thread"\, v. t. [1st pref. un- + thread.]
1. To draw or take out a thread from; as, to unthread a
   needle.
2. To deprive of ligaments; to loose the ligaments of.
         He with his bare wand can unthread thy joints.
                                               --Milton.
3. To make one's way through; to traverse; as, to unthread a
   devious path. --De Quincey.