torsion

n [U] 1 twisting, esp of one end of sth while the other end is held fixed 扭转（尤指一端固定而扭转另一端）. 2 state of being twisted in a spiral 被旋转成的螺旋形.

tor, torch, torchlight, tore, toreador, torment, tormentor, torn, tornado, torpedo, torpedo-boat, torpid, torpidity, torpidly, torpor, torque, torrent, torrential, torrents, torrid, torso, tort, tortilla, tortoise, tortoiseshell, tortuosity, tortuous, tortuously, torture, torturer, Tory, Toryism, toss, toss a coin, toss-up, tot, total, totalitarian, totalitarianism, totality,