Stealthy actions or movements are performed quietly and carefully, so that no one will notice what you are doing. I would creep in and with stealthy footsteps explore the second-floor + stealthily stealthi·ly Slowly and stealthily, someone was creeping up the stairs. moving or doing something quietly and secretly
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"