| muted(verb, adjective, dull, close, quiet) |
| dull(adjective, quiet, weak, soft, gentle) |
| deadened(verb, adjective, quiet, weak, pale) |
| indistinct(adjective, dull, quiet, weak, soft) |
| low(adjective, dull, close, quiet, weak) |
| soft(adjective, dull, close, quiet, weak) |
| stifled(verb, adjective, dull, quiet, weak) |
| faint(adjective, quiet, weak, soft, low) |
| hushed(verb, adjective, dull, close, quiet) |
| silenced(verb, adjective, quiet, silent, mum) |
| subdued(verb, adjective, dull, close, quiet) |
| covered |
| damped(verb, adjective, non-resonant) |
| dulled(verb, quieted) |
| flat(adjective, quiet, soft, dark, cold) |
| quiet(adjective, dull, close, weak, soft) |
| softened(verb, adjective, dull, quiet, weak) |
| dead(adjective, non-resonant) |
| hollow(adjective, deep, resonant) |
| inaudible(adjective, dull, close, quiet, weak) |