Stealthy

[Sarah]

Done by stealth; accomplished clandestinely; unperceived;secret; furtive; sly.[Withered murder] with his stealthy pace, . . . Moves like a ghost.Shak.

[Sarah]

to be sneaky and quiet.
synonyms include: wily, cat-like.

[Sarah]

dane joella-like
the quality of being able to exit a room in a college dormitory without notice by emily smith.

[Sarah]

a skateboarding term for cleanliness after a clean trick is landed.
making everyone silent after the trick is landed, hence, STEALTHY

[Hina Muqadas]

Behaving or done in a cautious and surreptitious manner, so as not to be seen or heard.