1. (

• furtive ,
• sneak ,
• sneaky ,
• stealthy ,
• surreptitious

) marked by quiet and caution and secrecy; taking pains to avoid being observed; "a furtive manner"; "a sneak attack"; "stealthy footsteps"; "a surreptitious glance at his watch" ;

2. (

• backstair ,
• backstairs ,
• furtive

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