| Byzantine(adjective, hard, fancy, obscure, difficult) |
| Gordian(adjective, hard, fancy, obscure, difficult) |
| blurred(unclear, indistinct, indistinguishable) |
| cabalistic(adjective, knowledge, evil, obscure, dark) |
| exceptional(extraordinary, remarkable, particular) |
| extraordinary(unusual, strange, exceptional, remarkable, particular) |
| fantastic(strange, odd, unlikely, unbelievable, improbable) |
| flustering |
| hidden(adjective, hard, evil, obscure, difficult) |
| imprecise(unclear, indistinct, indistinguishable) |
| incoherent(adjective, unintelligible) |
| inconclusive(obscure, uncertain, vague, unclear, indefinite) |
| incredible(unreasonable, dubious, unlikely, flimsy, unbelievable) |
| inexplicit(adjective, obscure, uncertain, vague, unclear) |
| insoluble |
| labyrinthine(adjective, hard, fancy, obscure, difficult) |
| misleading |
| muddling |
| mystical(adjective, hard, knowledge, evil, obscure) |
| nebulous(unclear, indistinct, indistinguishable) |