| private(adjective, obscure, intimate, secret, restricted) |
| profound(adjective, obscure, complex, deep, mysterious) |
| puzzling(adjective, knowledge, evil, obscure, dark) |
| concealed(adjective, hard, evil, obscure, difficult) |
| opaque(adjective, hard) |
| confidential(adjective, intimate, secret, private, restricted) |
| mystifying(adjective, knowledge, evil, obscure, dark) |
| clandestine(adjective, secret, underground, undisclosed) |
| covert(adjective, strange, secret, clandestine, underground) |
| intimate(private, restricted) |
| perplexing(adjective, obscure, difficult, dark, strange) |
| privy(adjective, intimate, secret, private, restricted) |
| subtle(adjective, ironic, deadpan, understated, laconic) |
| hush-hush(adjective, intimate, secret, private, clandestine) |
| intricate(adjective, evil, heavy, deep, doubtful) |
| personal(intimate, private, restricted) |
| preternatural(adjective, obscure, deep, mysterious, supernatural) |
| restricted(adjective, secret, clandestine, underground, undisclosed) |
| supernatural(adjective, spiritual, mystical) |
| unaccountable(adjective, solid, strange, doubtful, vague) |