| individual(adjective, separate, secret, private, mental) |
| inherent(adjective, private, mental, inner) |
| intrinsic(adjective, individual, original, basic, fundamental) |
| intuitive(adjective, private, mental, unconscious, inner) |
| inward(adjective, private, mental, inner) |
| isolated(adjective, quiet, obscure, remote, private) |
| potential(adjective, promising) |
| profound(hard, obscure, complex, deep, mysterious) |
| remote(adjective, close, quiet, cover, separate) |
| repressed(adjective, individual, private, mental, unconscious) |
| sneaking(secret, private, sneaky, covert) |
| symbolic(adjective, mysterious) |
| unapparent(adjective, invisible, latent) |
| under cover(expression, adjective, idiom, cover, show) |
| underhand(adjective, secret, private, clandestine, sneaky) |
| unfathomable(adjective, hard, obscure, difficult, solid) |
| unknowable(adjective, obscure, solid, dark, superior) |
| unnoticed(adjective, ignored, overlooked, unobserved) |
| cloaked(verb, adjective, obscure, secret, unknown) |
| underlying(adjective, fundamental, latent) |