adj : marked by quiet and caution and secrecy; taking pains to
avoid being observed; "a furtive manner"; "a lurking
prowler"; "a sneak attack"; "stealthy footsteps"; "a
surreptitious glance at his watch"; "someone skulking
in the shadows" [syn: furtive, lurking, skulking, sneak(a), sneaky, surreptitious]