| gray(adjective, dull, dark, gloomy, faint) |
| imperceptible(adjective, calm, dull, quiet, weak) |
| irksome |
| light(adjective, calm, dull, quiet, weak) |
| low-key(adjective, quiet, gentle, plain, restrained) |
| mat(adjective, dull, dark, gloomy, faint) |
| slow(adjective, calm, quiet, smooth, soft) |
| smooth(adjective, calm, dull, quiet, weak) |
| smothered |
| subtle(adjective, quiet, weak, soft, gentle) |
| tranquil(adjective, calm, quiet, smooth, soft) |
| unclear(adjective, dull, close, quiet, weak) |
| understated(verb, adjective, dull, quiet, faint) |
| back |
| bated(weak, pale, faded) |
| blind(adjective, dull, weak, soft, obscure) |
| calmed |
| close(adjective, quiet, soft, severe, low) |
| conservative(calm, quiet, reasonable, mild, restrained) |
| dead(adjective, dull, weak, soft, obscure) |