| supersensible(adjective, obscure, dark, superior, sensitive) |
| transmundane(adjective, obscure, sensitive, deep, mysterious) |
| ulterior |
| unexplainable |
| unexplained |
| Orphic |
| acroamatic(adjective, obscure, complex, deep, thoughtful) |
| anagogic(adjective, evil, deep, mysterious, supernatural) |
| arcanum |
| backstairs(clandestine, underground, undisclosed) |
| bewitched(adjective, extraordinary, unusual, wonderful, marvelous) |
| block(verb, cover, hide, conceal, eclipse) |
| blot out(verb, expression, phrasal verb, cover, block) |
| camouflage(verb, cover, block, hide, store) |
| charismatic(adjective, extraordinary, unusual, wonderful, marvelous) |
| classified(obscure, unknown, clandestine, underground, undisclosed) |
| classified information(expression, confidence, mystery) |
| cloak(verb, cover, block, hide, store) |
| closed book(noun, expression, question, secret, puzzle) |
| clouded(obscure, dark, secret, unknown, hidden) |