| in the recesses(expression, adjective, idiom, oppressed, downtrodden) |
| incog |
| incognito(secret, hidden, spy, clandestine, underground) |
| inconstant(fickle, untrustworthy, unprincipled) |
| indirect(dishonest, cunning, deceitful, sneaky, underhanded) |
| inferior(sub-rosa, groundward) |
| inside(secret, private, clandestine, underground, undisclosed) |
| intelligence(adjective, secret, hidden, spy, covert) |
| kept concealed(expression, sensitive, sub-rosa) |
| limited(private, confidential) |
| lying(fickle, untrustworthy, unprincipled, dirty-dealing) |
| mercentary(fickle, untrustworthy, unprincipled, dirty-dealing) |
| moonlighting(fickle, untrustworthy, unprincipled, dirty-dealing) |
| mum |
| mysterious(obscure, private, reticent, unknown, clandestine) |
| mystic(obscure, unknown, clandestine, underground, undisclosed) |
| mystical(obscure, unknown, clandestine, underground, undisclosed) |
| nescient(unknowing, hermetical, unbriefed) |
| not informed(expression, unknowing, hermetical, unbriefed) |
| not knowing(expression, unknowing, hermetical, unbriefed) |