silencer

silence +‎ -er

silencer (plural silencers)

1. Something that silences
   1. An attachment to a gun or an exhaust pipe that reduces the sound it emits
   2. The muffler of an internal combustion engine.
      • 1962 April, P. W. B. Semmens, “The Netherlands Railways today”, in Modern Railways, page 241:

        Before the fitting of silencers to these locomotives was completed by the end of 1961, they were very noisy in operation, but the effect of the silencer has been remarkable.

   3. Any of various devices to silence the humming noise of telegraph wires
   4. (genetics) Something that prevents gene expression

• (attachment): suppressor
• (firearms): suppressor, muffler
• (in exhaust system) muffler

• licenser, reclines, sclerine