| equivocal(adjective, obscure, rough, difficult, dark) |
| ambiguous(adjective, vague, unclear, misleading, indistinct) |
| opaque(adjective, hard) |
| tenebrous(adjective, obscure, rough, difficult, dark) |
| vague(adjective, clear, obscure, rough, difficult) |
| enigmatic(adjective, obscure, rough, difficult, uncertain) |
| obscure(adjective, rough, difficult, dark, uncertain) |
| uncertain(adjective, obscure, rough, difficult, dark) |
| unclear(adjective, obscure, rough, difficult, dark) |
| murky |
| unintelligible(adjective, obscure, rough, difficult, uncertain) |
| cloudy(adjective, unclear, indistinct, indistinguishable) |
| cryptic(adjective, obscure, difficult, uncertain, unclear) |
| doubtful(adjective, vague, unclear, ambiguous, misleading) |
| dubious(adjective, vague, unclear, ambiguous, misleading) |
| dusky |
| fuzzy(adjective, vague, unclear, ambiguous, misleading) |
| hazy(adjective, vague, unclear, ambiguous, misleading) |
| imprecise(adjective, unclear, indistinct, indistinguishable) |
| indefinite(adjective, vague, unclear, ambiguous, misleading) |