Adjective
1. 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"2. secret and sly or sordid;
"backstairs gossip""his low backstairs cunning"- A.L.Guerard"backstairs intimacies""furtive behavior"