lurking (
http://definr.com/lurking)
adj 1: concealed and unsuspected; "lurking dangers"; "search for
lurking ambiguities"
2: 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,
skulking,
sneak(a),
sneaky,
stealthy,
surreptitious]