untie

verb

1. 1

   To loosen, as something interlaced or knotted; to disengage the parts of.

   “to untie a knot”

2. 2

   To free from fastening or from restraint; to let loose; to unbind.

3. 3

   To resolve; to unfold; to clear.

4. 4

   To become untied or loosed.

5. 5

   In the Perl programming language, to undo the process of tying, so that a variable uses default instead of custom functionality.