stopper
/ˈstɔpə(r); `stɑpɚ/ (US plug) n object that fits into and closes an opening, esp the top of a bottle or pipe 阻塞物; 堵塞物; （尤指）瓶塞, 管塞; 栓
put the stopper back into a bottle 把瓶塞再塞在瓶子上. =>illus at bottle 见 bottle 插图. stopper, v [Tn]
close (sth) with a stopper （用塞子等）塞住（某物）.