to undo, untie, or open or become undone, untied, or opened.
Somehow she managed to unsnib the window and escape.
To become untied or loosed.
In the Perl programming language, to undo the process of tying, so that a variable uses default instead of custom functionality.
To resolve; to unfold; to clear.
To loosen, as something interlaced or knotted; to disengage the parts of.
To free from fastening or from restraint; to let loose; to unbind.