(1):

(v. t.) To disentangle; to disengage or separate the threads of; as, to unravel a stocking.

(2):

(v. t.) Hence, to clear from complication or difficulty; to unfold; to solve; as, to unravel a plot.

(3):

(v. t.) To separate the connected or united parts of; to throw into disorder; to confuse.

(4):

(v. i.) To become unraveled, in any sense.