| quieted(verb, adjective, close, quiet, soft) |
| silenced(verb, quiet, stifled, silenced) |
| stilled(verb, adjective, close, quiet, soft) |
| boring(adjective, dull, weak, flat, dead) |
| checked(verb, quiet, soft, reasonable, restrained) |
| dumb(adjective, close, quiet, soft, low) |
| lackluster(adjective, dull, dark, gloomy, faint) |
| leaden(adjective, dull, quiet, soft, severe) |
| mute(adjective, dull, close, quiet, soft) |
| placid(adjective, calm, quiet, smooth, soft) |
| plain(adjective, calm, quiet, simple, soft) |
| restrained(verb, adjective, calm, close, quiet) |
| soundless(adjective, close, quiet, soft, low) |
| still(adjective, close, quiet, soft, low) |
| toned down(verb, expression, adjective, phrasal verb, quiet) |
| calm(adjective, quiet, smooth, soft, reasonable) |
| damped(verb, adjective) |
| dampened(verb, adjective) |
| dense |
| dulled |