| recondite(adjective, evil, obscure, dark, strange) |
| surreptitious(adjective, dishonest, cunning, secret, hidden) |
| mysterious(adjective, evil, obscure, strange, new) |
| arcane(adjective, hard, evil, obscure, difficult) |
| hush-hush(adjective, separate, dishonest, secret, hidden) |
| out of sight(expression, adjective, idiom, secret, hidden) |
| personal(adjective, cover, obscure, dark, private) |
| privy(adjective, cover, separate, obscure, dark) |
| shrouded(verb, adjective, obscure, secret, hidden) |
| ulterior(adjective, show, obscure, secret, hidden) |
| underground(adjective, secret, unknown, hidden, spy) |
| undisclosed(adjective, obscure, dark, secret, imperceptible) |
| abstruse(adjective, evil, obscure, difficult, dark) |
| cloaked(verb, adjective) |
| covered(verb, adjective, obscure, fake, counterfeit) |
| imperceptible(adjective, hidden, insensible, inconspicuous, unremarkable) |
| incognito(adjective, strange, disguise, secret, hidden) |
| intrinsic(adjective, individual, basic, fundamental, private) |
| stealthy(adjective, dishonest, cunning, secret, hidden) |
| unapparent(adjective, invisible, latent) |