\Un*twine"\, v. t. [1st pref. un- + twine.]
To untwist; to separate, as that which is twined or twisted;
to disentangle; to untie.

      It requires a long and powerful counter sympathy in a
      nation to untwine the ties of custom which bind a
      people to the established and the old.   --Sir W.
                                               Hamilton.

\Un*twine"\, v. i.
To become untwined. --Milton.