| mysterious(adjective, dark, uncertain, doubtful, vague) |
| oblique(adjective, uncertain, doubtful) |
| perplexing(adjective, obscure, rough, difficult, dark) |
| tenebrous(adjective, obscure, rough, difficult, dark) |
| undecided(adjective, open, uncertain, definite, doubtful) |
| borderline(adjective, clear, open, delicate, certain) |
| hazy(adjective, informal, uncertain, doubtful, vague) |
| suspect(adjective, honest, uncertain, doubtful, vague) |
| amphibolous(adjective, equivocalness) |
| clouded(adjective, clear, obscure, certain, uncertain) |
| cringeworthy |
| open(adjective, uncertain, unstable, doubtful, unsettled) |
| shady(adjective, honest, uncertain, doubtful, dubious) |
| unsure(adjective, clear, open, rough, delicate) |
| confused(adjective, uncertainty, uncertain, unsettled, vague) |
| dubitable(adjective, clear, certain, uncertain, anxious) |
| enigmatical(obscure, strange, uncertain, vague, unclear) |
| indecisive(adjective, clear, open, delicate, certain) |
| inexplicit(adjective, clear, obscure, certain, uncertain) |
| opaque(adjective, hard, obscure, difficult, uncertain) |