Definition from Wiktionary, the free dictionary
- Rhymes: -ævəl
- to separate the threads (of)
- Stop playing with the seam of the table cloth! You will unravel it.
- Mother couldn't unravel the ball of wool anymore after the cat had played with it.
- (intransitive) to become undone
Usage notes 
unraveling and unraveled are primarily US while unravelling and unravelled are primarily UK.
to separate the threads (of)