What is to make investigation or search, as by picking out the threads of a woven pattern. [Obs.] The humor of raveling into all these mystical or entangled matters. Sir W. Temple called?

ravel — To make investigation or search, as by picking out the threads of a woven pattern. [Obs.] The humor of raveling into all these mystical or entangled matters. Sir W. Temple. (Webster's 1913.)

Sources