| muddy(adjective, dull, soft, obscure, flat) |
| enigmatic(adjective, hard, obscure, uncertain, vague) |
| indistinct(adjective, dull, soft, obscure, flat) |
| shadowy(adjective, dull, soft, obscure, flat) |
| arcane(adjective, hard) |
| clouded(adjective, dull, obscure, dark, gloomy) |
| dense(adjective, dull, set, solid, dark) |
| dusky(adjective, dull, soft, obscure, flat) |
| gloomy(adjective, dull, flat, dark, dirty) |
| night |
| obtuse(adjective, hard, slow) |
| tenebrous(adjective, dull, hard, obscure, difficult) |
| unfathomable(adjective, hard) |
| abstruse(adjective, hard, obscure, difficult, uncertain) |
| filmy(adjective, muddy, covered, clouded, blurry) |
| obfuscated(adjective, obscure, muddy, clouded) |
| perplexing(adjective, hard, obscure, difficult, unfathomable) |
| uncertain(adjective, hard, obscure, difficult, vague) |
| ambiguous(adjective, obscure, uncertain, vague, unclear) |
| amorphous(adjective, obscure) |