| spiritual(adjective, private, abstract, mental, theoretical) |
| unrevealed(adjective, obscure, dark, secret, private) |
| incomprehensible |
| inner(adjective, obscure, mysterious, private, mental) |
| internal(adjective, secret, private, mental, inner) |
| shadowy(adjective, obscure, dark, unknown, unclear) |
| ambiguous(obscure, unknown, unclear, clandestine, underground) |
| covert(adjective, strange, secret, unknown, hidden) |
| dark(adjective, feature, obscure, mysterious, hidden) |
| deep-seated(adjective, private, mental, inner) |
| exclusive(adjective, secret, private, confidential, speciality) |
| inherent(adjective, private, mental, inner) |
| inscrutable(adjective, obscure, strange, mysterious, supernatural) |
| intrinsic(adjective, private, mental, inner) |
| inward(adjective, private, mental, inner) |
| veiled(adjective, obscure, strange, mysterious, secret) |
| cabbalistic |
| clandestine(adjective, secret, unknown, hidden, concealed) |
| classified(obscure, secret, unknown, clandestine, underground) |
| fine(adjective, exact, discriminating) |