| dark(adjective, dull, gloomy, black, darkish) |
| gloomy(adjective, dull, obscure, dark, miserable) |
| murky(adjective, dull, obscure, dark, sorrow) |
| dusky(adjective, dull, dark, gloomy) |
| obscure(adjective, dull, rough, difficult, dark) |
| shadowy(adjective, dull, rough, dark, sorrow) |
| somber(adjective, upset, dull, sad, dark) |
| vague(adjective, dull, clear, obscure, rough) |
| sunless(adjective, dull, dark, sorrow, gloomy) |
| cloudy(adjective, dull, obscure, rough, dark) |
| unlit(adjective, dull, dark, gloomy) |
| caliginous(adjective, dull, obscure, dark, gloomy) |
| dingy(adjective, dull, dark, gloomy, miserable) |
| dusk(adjective, dull, dark, gloomy) |
| shady(adjective, dull, obscure, dark, gloomy) |
| opaque(adjective, dull, hard, obscure, difficult) |
| nebulous(adjective, dull, rough, dark, gloomy) |
| overcast(adjective, dull, obscure, dark, sorrow) |
| Stygian(adjective, dull, dark, gloomy) |
| clouded(adjective, dull, dark, gloomy) |