| censored(verb, adjective, concealed) |
| confidential(adjective, close, quiet, separate, safe) |
| deep-rooted(adjective, private, mental, inner) |
| dim(quiet, plain, imperceptible, discreet, inconspicuous) |
| enshrouded(verb, adjective, concealed, screened) |
| essential(adjective, individual, original, basic, fundamental) |
| hermetic(adjective, close, quiet, obscure, mysterious) |
| hide |
| impenetrable(adjective, obscure, difficult, solid, dark) |
| innate(adjective, private, mental, inner) |
| inscrutable(adjective, obscure, solid, strange, sophisticated) |
| inside(adjective, individual, private, mental, personal) |
| lurking(adjective, original, basic, fundamental, likely) |
| restricted(clandestine, underground, undisclosed) |
| secretive(adjective, quiet, obscure, plain, strange) |
| sequestered(adjective, close, quiet, separate, humble) |
| shadowy(adjective, secret, unseen) |
| spiritual(adjective, strange, individual, private, supernatural) |
| suppressed(adjective, unconscious, immense, concealed, dormant) |
| untold(adjective, strange, new, remote, mysterious) |