Antonyms of verb unknot

1 sense of unknot

Sense 1
unravel, unknot, unscramble, untangle, unpick -- (become or cause to become undone by separating the fibers or threads of; "unravel the thread")
       Antonym of knot (Sense 3)
      => ravel, tangle, knot -- (tangle or complicate; "a ravelled story")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb unknot

1 sense of unknot

Sense 1
unravel, unknot, unscramble, untangle, unpick -- (become or cause to become undone by separating the fibers or threads of; "unravel the thread")
       => undo -- (cancel, annul, or reverse an action or its effect; "I wish I could undo my actions")