| caliginous(adjective, dull, light, obscure, dark) |
| dopey(adjective, dull, simple, stupid, limited) |
| flat(adjective, dull, quiet, light, soft) |
| obfuscate(verb, cover, clear, reduce, lower) |
| subdued(adjective, dull, quiet, weak, soft) |
| overshadow(verb, cover, clear, diminish, obscure) |
| befog(verb, cover, clear, reduce, lower) |
| blunt(verb, adjective, dull, quiet, diminish) |
| dimmed(adjective, quiet, faint, melodious, muted) |
| drab(adjective, dull, weak, soft, blue) |
| dusk(noun, adjective, dull, dark, gloomy) |
| muted(adjective, dull, quiet, weak, soft) |
| soft(adjective, dull, quiet, light, weak) |
| bleak(adjective, dull, obscure, dark, gloomy) |
| brainless(adjective, dull, simple, slow, stupid) |
| crepuscular(adjective, dull, obscure, dark, gloomy) |
| depressing(adjective, dull, blue, obscure, sad) |
| dim-witted(adjective, dull, simple, slow, foolish) |
| gray(noun, verb, adjective, dull, cover) |
| half ass |