tortuous (adj.)

late 14c., "full of twists and turns," from Anglo-French tortuous (12c.), Old French tortuos, from Latin tortuosus "full of twists, winding," from tortus "a twisting, winding," from stem of torquere "to twist, wring, distort" (from PIE root *terkw- "to twist"). Related: Tortuously; tortuousness.