[ I or T ] If a piece of knitted or woven cloth, a knot, or a mass of thread unravels, it separates into a single thread, and if you unravel it, you separate it into a single thread.（把布、结或线团）解开；拆散

[ I or T ] If you unravel a mysterious, unknown, or complicated subject, you make it known or understood, and if it unravels, it becomes known or understood.揭开，弄清，阐明（谜团或复杂问题）；被澄清；被解决

[ I, T usually passive ] If a process or achievement that was slow and complicated unravels or is unravelled, it is destroyed.破坏（成就等）