gangster

n. 匪徒,歹徒

These gangsters have been extinguished by the police.

这群匪徒已被警方消灭。

The gangster killed the only witness to his crime, on the principle that dead men tell no tales.

因为死人是不会告密的，所以那歹徒把他犯罪的唯一见证人杀害了。