| dull(adjective, weak, soft, gentle, obscure) |
| undefined(adjective, weak, dark, uncertainty, uncertain) |
| doubtful(adjective, clear, open, obscure, rough) |
| murky(adjective, dull, obscure, dark, gloomy) |
| opaque(adjective, dull, hard, obscure, difficult) |
| undetermined(adjective, clear, open, rough, certain) |
| bleary(adjective, dull, clear, obscure, rough) |
| blurry(adjective, dull, obscure, cloudy) |
| unintelligible(adjective, clear, obscure, rough, difficult) |
| pale(adjective, dull, weak, soft, gentle) |
| clouded(adjective, dull, obscure, dark, gloomy) |
| imperceptible(adjective, dull, hard, weak, soft) |
| filmy(adjective, cloudy, murky, hazy) |
| indistinguishable(adjective, weak, slight, obscure, fine) |
| tenebrous(adjective, dull, clear, obscure, rough) |
| weak(adjective, dull, soft, gentle, dark) |
| feeble(adjective, dull, weak, soft, gentle) |
| shady(adjective, dull, obscure, dark, gloomy) |
| drab(adjective, dull, dark, gloomy) |
| dusky(adjective, dull, obscure, dark, gloomy) |