stopper

n. (瓶子等的)塞子,阻塞物,妨碍物

The stopper may blow out.

塞子会被冲出来。

An object, such as a cork or a wad of cloth, used to fill a hole tightly; a stopper.

塞子；栓子用来填紧洞孔的物体，如软木塞或一团布；塞子