Definitions

1. verb

to remove the knot from (a rope, string, etc.)

“She had to unknot the tangled shoelaces before she could wear the shoes.”

2. noun

a loose or untied knot, especially in a rope or string

“The unknot in the sail caused it to flap in the wind.”

3. verb

to untie or undo (a knot)

“He had to unknot the rope to pull up the anchor.”