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. 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. marked by deception; "achieved success in business only by underhand methods"

adj. secret or hidden; not openly practiced or engaged in or shown or avowed; "covert actions by the CIA"; "covert funding for the rebels"

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. working or spreading in a hidden and usually injurious way; "glaucoma is an insidious disease"; "a subtle poison"

adj. controlled or decreed by fate; predetermined; "a fatal series of events"

adj. causing or capable of causing death; "a fatal accident"; "a deadly enemy"; "mortal combat"; "a mortal illness"

adj. (unplayful)

adj. tending to favor preconceived ideas; "the presence of discriminatory or prejudicial attitudes in the white population"

adj. harmful to living things; "deleterious chemical additives"

adj. causing or capable of causing harm; "too much sun is harmful to the skin"; "harmful effects of smoking"

adj. (of movement) at an angle

adj. turned or twisted toward one side; "a...youth with a gorgeous red necktie all awry"- G.K.Chesterton; "his wig was, as the British say, skew-whiff"

adj. having or marked by bends or angles; not straight or aligned; "crooked country roads"; "crooked teeth"

adj. marked by skill in deception; "cunning men often pass for wise"; "deep political machinations"; "a foxy scheme"; "a slick evasive answer"; "sly as a fox"; "tricky Dick"; "a wily old attorney"

adj. concerning things deeply private and personal; "private correspondence"; "private family matters"

adj. not as expected; "there was something fishy about the accident"; "up to some funny business"; "some definitely queer goings-on"; "a shady deal"; "her motives were suspect"; "suspicious behavior"

adj. hidden from general view or use; "a privy place to rest and think"; "a secluded romantic spot"; "a secret garden"

adj. marked by deception; "achieved success in business only by underhand methods"

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

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

adj. having markings suggestive of a mask; "the masked face of a raccoon"

adj. with your identity concealed

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

adj. indulging only covertly; "a secret alcoholic"

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. not concealed or hidden; "her unconcealed hostility poisoned the atmosphere"; "watched with unconcealed curiosity"

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