To loosen, as something interlaced or knotted; to disengage the parts of.
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 become untied or loosed.
To free from fastening or from restraint; to let loose; to unbind.
To squeeze (wet clothing or cloth), either by twisting with one's hands, or by passing it through a wringer, to remove the water.
To push (an aircraft) to its performance limits; to push the envelope.
To force someone to give (something), usually truth, or money.