| puzzling(adjective, hard, knowledge, evil, obscure) |
| dark(adjective, mysterious, obscure, secret, hidden) |
| perplexing(adjective, hard, obscure, rough, difficult) |
| mysterious(adjective, hard, knowledge, evil, obscure) |
| cryptic(adjective, cover, knowledge, evil, sharp) |
| baffling(adjective, hard, obscure, difficult, solid) |
| incomprehensible(adjective, obscure, difficult, solid, strange) |
| obscure(adjective, cover, hard, sharp, rough) |
| mystifying(adjective, hard, knowledge, evil, obscure) |
| ambiguous(adjective, cover, obscure, rough, dark) |
| inscrutable(adjective, obscure, strange, blank, sophisticated) |
| arcane(adjective, knowledge, evil, obscure, difficult) |
| confusing(adjective, hard, uncertain, vague, unclear) |
| recondite(adjective, evil, sharp, obscure, difficult) |
| abstruse(noun, adjective, hard, evil, sharp) |
| esoteric(adjective, hard, evil, sharp, obscure) |
| occult(adjective, knowledge, evil, strange, explain) |
| unclear(adjective, hard, obscure, rough, difficult) |
| unfathomable(adjective, hard, obscure, difficult, solid) |
| enigmatical(adjective, hard, obscure, solid, uncertain) |