| recondite(adjective, evil, obscure, strange, deep) |
| dark(adjective, obscure, mysterious, secret, hidden) |
| mysterious(adjective, knowledge, evil, obscure, solid) |
| secret(adjective, evil, obscure, strange, odd) |
| occult(noun, adjective, knowledge, evil, obscure) |
| esoteric(adjective, evil, obscure, strange, deep) |
| cryptic(adjective, knowledge, evil, obscure, difficult) |
| obscure(adjective, dull, hard, difficult, solid) |
| abstruse(adjective, evil, obscure, difficult, strange) |
| mystic(adjective, knowledge, evil, obscure, solid) |
| impenetrable(adjective, obscure, solid, strange, doubtful) |
| incomprehensible(adjective, obscure, difficult, solid, strange) |
| deep(adjective, hard, evil, obscure, heavy) |
| enigmatic(adjective, knowledge, evil, obscure, difficult) |
| hidden(verb, adjective, evil, obscure, solid) |
| mystical(adjective, hard, knowledge, evil, obscure) |
| inscrutable(adjective, solid, strange, blank, dense) |
| unfathomable(adjective, obscure, difficult, solid, strange) |
| classified(adjective, obscure, intimate, secret, private) |
| cabalistic(adjective, knowledge, evil, obscure, solid) |