adj. difficult to find; "hidden valleys"; "a hidden cave"; "an obscure retreat"

adj. not accessible to view; "concealed (or hidden) damage"; "in stormy weather the stars are out of sight"

adj. covered from view: "her face buried (or hidden) in her hands"; "buried in the smoke of many rifles"

adj. not accessible to view; "concealed (or hidden) damage"; "in stormy weather the stars are out of sight"

adj. requiring secret or mysterious knowledge; "the arcane science of dowsing"

adj. having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding; "mysterious symbols"; "the mystical style of Blake"; "occult lore"; "the secret learning of the ancients"

adj. having a secret or hidden meaning; "cabalistic symbols engraved in stone"; "cryptic writings"; "thoroughly sibylline in most of his pronouncements"- John Gunther

adj. hidden on any grounds for any motive; "a concealed weapon"; "a concealed compartment in his briefcase"

adj. entrusted with private information and the confidence of another; "a confidential secretary"

adj. confined to particular persons or groups or providing privacy; "a private place"; "private discussions"; "private lessons"; "a private club"; "a private secretary"; "private property"; "the former President is now a private citizen"; "public figures struggle to maintain a private life"

adj. covered from view: "her face buried (or hidden) in her hands"; "buried in the smoke of many rifles"

adj. with shutters closed

adj. "a closet alcoholic"

adj. marked by quiet and caution and secrecy; taking pains to avoid being observed; "a furtive manner"; "a sneak attack"; "stealthy footsteps"; "a surreptitious glance at his watch"

adj. lying in wait as in ambush: "a lurking prowler"; "the lurking menaces of the future"

adj. undisclosed for the time being; "sealed orders"; "a sealed move in chess"

adj. not open or public; kept private or not revealed; "a secret formula"; "secret ingredients"; "secret talks"

adj. not openly expressed; "a sneaking suspicion"

adj. kept secret; "the plan was kept carefully under wraps"

adj. conducted with or marked by hidden aims or methods; "clandestine intelligence operations"; "cloak-and-dagger activities behind enemy lines"; "hole-and-corner intrigue"; "secret missions"; "a secret agent"; "secret sales of arms"; "surreptitious mobilization of troops"; "an undercover investigation"; "underground resistance"

adj. acting together in secret toward a fraudulent or illegal end

adj. having its true character concealed with the intent of misleading; "hidden agenda"; "masked threat"

adj. with your identity concealed

adj. protected from danger or bad weather; "a sheltered harbor"

adj. designed and carried out secretly or confidentially; "a sub-rosa report"; "has their under-the-table backing"

adj. lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed); "subterranean motives for murder"; "looked too closely for an ulterior purpose in all knowledge"- Bertrand Russell

adj. not made known

adj. with shutters closed

adj. "a closet alcoholic"

adj. marked by quiet and caution and secrecy; taking pains to avoid being observed; "a furtive manner"; "a sneak attack"; "stealthy footsteps"; "a surreptitious glance at his watch"

adj. difficult to find; "hidden valleys"; "a hidden cave"; "an obscure retreat"

adj. lying in wait as in ambush: "a lurking prowler"; "the lurking menaces of the future"

adj. undisclosed for the time being; "sealed orders"; "a sealed move in chess"

adj. not open or public; kept private or not revealed; "a secret formula"; "secret ingredients"; "secret talks"

adj. not openly expressed; "a sneaking suspicion"

adj. kept secret; "the plan was kept carefully under wraps"

adj. not easily seen

adj. made invisible by means of protective coloring

adj. having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end; "infrared radiation"; "infrared photography"

adj. having or employing wavelengths shorter than light but longer than X-rays; lying outside the visible spectrum at its violet end; "ultraviolet radiation"; "an ultraviolet lamp"

adj. not seen or perceived; "unseen natural resources"

adj. open and observable; not secret or hidden; "an overt lie"; "overt hostility"; "overt intelligence gathering"; "open ballots"