| verb | deaden (a sound or noise), especially by wrapping |
| adjective | in a softened tone “hushed voices” |
| adjective | being or made softer or less loud or clear “the dull boom of distant breaking waves” |
| muffler | noun | a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations |
| mute | noun | a device used to soften the tone of a musical instrument |
| damper | noun | a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations |
| subduedness | noun | the property of lights or sounds that lack brilliance or are reduced in intensity |