a place that is a network of intricate passageways, tunnels, blind alleys, etc
something perplexingly complex or tortuous in structure or, arrangement, or character
in anatomy, the complex network of twisting bony cavities that forms the inner ear
labyrinthine adj
labyrinthian adj
[Middle English laborintus via Latin from Greek labyrinthos, orig with reference to the maze in Greek mythology in which the Minotaur was kept]