verb (v)

• become or cause to become undone by separating the fibers or threads of(verb.contact)

  Example:
  Unravel the thread.
  

  Synonym:
  unknot, unpick, unscramble, untangle
  Antonym:
  knot, ravel, tangle
  

  source: wordnet30
• disentangle(verb.contact)

  Example:
  Can you unravel the mystery?.
  

  Synonym:
  ravel, ravel out
  

  source: wordnet30
• become undone(verb.change)

  Example:
  The sweater unraveled.
  

  Synonym:
  run
  

  source: wordnet30
• To disentangle; to disengage or separate the threads of; as, to unravel a stocking.(verb)

  source: webster1913
• To become unraveled, in any sense.(verb)

  source: webster1913