Verb unknot has 1 sense
  1. unravel, unknot, unscramble, untangle, unpick - become or cause to become undone by separating the fibers or threads of; "the sweater unravelled"
    --1 is one way to undo
    Antonyms: ravel, tangle, knot
    Sample sentences:
    Something ----s
    Somebody ----s something
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