Tortuous

tortuous \ˈtorch-wəs, ˈtor-chə-wəs\ adjective: 1. marked by repeated twists, bends or turns; winding {a tortuous path},
2 a. marked by devious or indirect tactics; crooked, tricky {a tortuous conspiracy}, b. circuitous, involved {the tortuous jargon of legal forms}

Etymology: Middle English, from Middle French tortueux, from Latin tortuosus, from tortus twist, from torquēre to twist

Torturous also comes from the Latin torquēre.