noun

1. a structure containing an intricate network of winding passages hard to follow without losing one's way; maze
2. a complicated, perplexing arrangement, course of affairs, etc.
3. Anat. the inner ear
4. Gr. Myth. the labyrinthine structure built by Daedalus for King Minos of Crete, to house the Minotaur

Etymology: ME laborintus (altered by folk etym. by assoc. with L labor, labor + intus, into) < L labyrinthus < Gr labyrinthos, of pre-Hellenic orig.