concealed

adjectives

not accessible to view
"concealed (or hidden) damage"; "in stormy weather the stars are out of sight"
concealed, hidden, out of sight
hidden on any grounds for any motive
"a concealed weapon"; "a concealed compartment in his briefcase"
concealed
antonym
unconcealed
is similar to
lying in ambush
"bushwhacking guerrillas attacking from ambush"
bushwhacking
is similar to
secret
"keep it dark"
dark
is similar to
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"
furtive, sneak, sneaky, stealthy, surreptitious
is similar to
difficult to find
"hidden valleys"; "a hidden cave"; "an obscure retreat"
hidden, obscure
is similar to
designed to elude detection
"a hidden room or place of concealment such as a priest hole"; "a secret passage"; "the secret compartment in the desk"
hidden, secret
is similar to
with your identity concealed
incognito
is similar to
waiting in concealment; in ambush
"an army lying in wait in the forest"
lying in wait
is similar to
undisclosed for the time being
"sealed orders"; "a sealed move in chess"
sealed
is similar to
not open or public; kept private or not revealed
"a secret formula"; "secret ingredients"; "secret talks"
secret
is similar to
not openly expressed
"a sneaking suspicion"
sneaking, unavowed
see also
secret or hidden; not openly practiced or engaged in or shown or avowed
"covert actions by the CIA"; "covert funding for the rebels"
covert