torpor

n. 有气无力，死气沉沉

topping, topple, tops, topside, topsoil, topsy-turvy, tor, torch, torchlight, tore, toreador, torment, tormentor, torn, tornado, torpedo, torpedo-boat, torpid, torpidity, torpidly, torque, torrent, torrential, torrents, torrid, torsion, torso, tort, tortilla, tortoise, tortoiseshell, tortuosity, tortuous, tortuously, torture, torturer, Tory, Toryism, toss, toss a coin,