tail

n. 尾部,后部,辫子;跟踪者
a. 在后面的,从后面而来的
v. 附于其后,尾随,逐渐消失

The actor's voice tailed away as he forgot his lines.

那演员忘了台词，说话的声音越来越小了。

The sting of a scorpion is in its tail.

蝎子的毒钩在其尾部.