Translation guide
A device to reduce noise, especially on a firearm or vehicle exhaust. In Japanese, the term depends on the context: firearms use 消音器, while vehicles use サイレンサー or マフラー.
A device attached to a gun to reduce the sound of firing.
The standard term for a firearm silencer. Literally 'sound suppressor'.
He attached a silencer to his pistol.
Loanword from English 'suppressor', often used in technical or military contexts.
The special forces used guns with suppressors.
A device in a vehicle's exhaust system to reduce engine noise.
The most common term for a car's muffler/silencer. Note: マフラー also means 'scarf'.
The car's muffler is broken and it's noisy.
Loanword from English 'silencer', used for vehicles, especially motorcycles.
Can be used for vehicle silencers, but less common than マフラー or サイレンサー.
Any device that reduces noise, not specific to firearms or vehicles.
In Japanese, マフラー can refer to a winter scarf or a vehicle's muffler. Context usually makes it clear, but be aware of the ambiguity.
I replaced the motorcycle's silencer.
This car's silencer is high-performance.
The air conditioner's silencer broke.