Meaning : Marked by quiet and caution and secrecy. Taking pains to avoid being observed.
Example :
A furtive manner.
A sneak attack.
Stealthy footsteps.
A surreptitious glance at his watch.
Synonyms : sneak, sneaky, stealthy, surreptitious
Meaning : Secret and sly or sordid.
Example :
Backstairs gossip.
His low backstairs cunning.
Backstairs intimacies.
Furtive behavior.
Synonyms : backstair, backstairs