c.1495 (implied in torturous), from M.Fr. torture "infliction of great pain, great pain, agony," from L.L. torture "a twisting, writhing, torture, torment," from stem of L. torquere "to twist, turn, wind, wring, distort" (see thwart). The verb is 1588, from the noun. Tortuous "full of twists" is recorded from 1426.