| muddled(adjective, uncertain, doubtful, faint, vague) |
| mysterious(adjective, strange, uncertain, doubtful, dubious) |
| open(adjective, certain, shaky, vague, ambiguous) |
| unbounded(adjective, complete, absolute, unrestrained, endless) |
| unknown(adjective, rough, strange, vague, mysterious) |
| unstable(adjective, loose, uncertain, doubtful, unsettled) |
| capricious(adjective, loose, unpredictable, unreliable, variable) |
| confusing(uncertain, vague, unclear, ambiguous, misleading) |
| dark(adjective, dull, weak, rough, strange) |
| debatable(adjective, uncertain, doubtful, vague, dubious) |
| diffuse(adjective, shapeless) |
| eternal(adjective, pause, endless, limitless) |
| featureless(adjective, shapeless) |
| generalized(adjective, unclear, indistinct, indistinguishable) |
| hesitant(adjective, open, uncertain, doubtful, vague) |
| illimitable(adjective, complete, unrestrained, endless, immense) |
| incalculable(adjective, complete, doubtful, vague, hesitant) |
| inchoate(adjective, chaotic) |
| incoherent(adjective, rough, chaotic, disorganized, unformed) |
| inconclusive(adjective, obscure, uncertain, doubtful, vague) |