si·lenc·er
noun/ˈsaɪlənsə(r)/
/ˈsaɪlənsər/
- (British English) (North American English muffler)a device that is fixed to the exhaust of a vehicle in order to reduce the amount of noise that the engine makes
（发动机的）消声器 - a device that is fixed to the end of a gun in order to reduce the amount of noise that it makes when it is fired
（枪支的）消音器