Rechercher
to untie
01
dénouer
to separate the parts of a lace, string, etc. that form a knot
02
détacher
cause to become loose
Exemple
Gordian legends tell of the famous knot that was said to be impossible to untie.
The rope was coiled loosely, ready to be untied easily.
The knot in the rope gradually tightened as he pulled it, making it more difficult to untie.