| equivocal(adjective, cover, obscure, difficult, dark) |
| vague(adjective, obscure, difficult, uncertain, doubtful) |
| opaque(adjective, hard, obscure, uncertain, secret) |
| unfathomable(adjective, obscure, difficult, dark, strange) |
| deep(adjective, hard, evil, obscure, humble) |
| perplexing(adjective, obscure, difficult, dark, strange) |
| concealed(adjective, cover, evil, obscure, difficult) |
| covert(adjective, obscure, dark, secret, reticent) |
| cryptical(adjective, concealment) |
| veiled(adjective, obscure, strange, secret, unknown) |
| close(adjective, obscure, dark, secret, reticent) |
| indefinite(obscure, uncertain, doubtful, vague, dubious) |
| inexplicable(adjective, obscure, dark, strange, uncertain) |
| baffling(adjective, obscure, difficult, dark, strange) |
| indecipherable(adjective, dark, uncertain, mysterious, unintelligible) |
| murky(adjective, obscure, secret) |
| oracular(adjective, obscure, dark, uncertain, doubtful) |
| secretive(adjective, obscure, strange, mysterious, secret) |
| strange(adjective, obscure, secret, unknown, clandestine) |
| confusing(adjective, uncertain, vague, unclear, unintelligible) |