| unknown(adjective, obscure, dark, superior, strange) |
| mysterious(adjective, hard, evil, obscure, solid) |
| abstruse(adjective, hard, evil, obscure, difficult) |
| buried(verb, adjective, show, obscure, secret) |
| undisclosed(adjective, cover, obscure, dark, secret) |
| recondite(adjective, evil, obscure, difficult, strange) |
| arcane(adjective, evil, obscure, solid, strange) |
| camouflaged(verb, adjective, quiet, obscure, secret) |
| furtive(adjective, strange, secret, clandestine, sneaky) |
| masked(verb, adjective, obscure, secret, unknown) |
| mystical(adjective, hard, evil, obscure, strange) |
| disguised(verb, adjective, obscure, secret, unknown) |
| intimate(adjective, private, mental, personal, inner) |
| out of sight(expression, adjective, idiom, adverb, view) |
| personal(adjective, close, quiet, obscure, private) |
| ulterior(adjective, cover, show, separate, obscure) |
| underground(adjective, secret, unknown, concealed, covert) |
| hid(verb, concealed, disappeared, shaded, screened) |
| hush-hush(adjective, quiet, separate, reserved, secret) |
| privy(adjective, cover, separate, obscure, dark) |