1) Detangle 2) Undo 3) Unfasten 4) Unpick 5) Unravel 6) Untie 1) Disentangle 2) Remove a tangle 3) Undo 4) Unpick 5) Unravel 6) Unscramble 7) Untangle 
The unknot arises in the mathematical theory of knots. Intuitively, the unknot is a closed loop of rope without a knot in it. A knot theorist would describe the unknot as an image of any embedding that can be deformed, i.e. ambient-isotoped, to the standard unknot, i.e. the embedding of the circle as a geometrically round circle. The unknot is als...
• (v. t.) To free from knots; to untie.
to untie by or as if by undoing a knot: to unknot a tie.