silencer

Something that silences or (notionally) nearly silences.

An attachment to a gun that reduces the sound it emits.

消声器

消音器

Something that silences or (notionally) nearly silences.

The muffler of an internal combustion engine.

Something that silences or (notionally) nearly silences.

Any of various devices to silence the humming noise of telegraph wires.

Something that silences or (notionally) nearly silences.

Something that prevents or greatly reduces gene expression.