General:
* The car's muffler was rusty and needed replacing.
* He wrapped a muffler around his neck to stay warm.
* The muffler on the motorcycle was very loud.
Specific situations:
* The mechanic checked the muffler for leaks.
* She bought a new muffler for her car at the auto parts store.
* The sound of the engine was muffled by the muffler.
Figurative language:
* The heavy snow acted as a muffler for the sounds of the city.
* The news report was a muffler for the truth.
Remember, the specific usage of "muffler" will depend on the context of your sentence.