backstairs Synonyms

backstair furtive backstage backroom underhanded underhand underground surreptitious stealthy stealthful stairway staircase sneaky behind-the-scenes sub-rosa dissimulated as close as the grave under the counter top secret undercover hush-hush hole-and-corner cloak-and-dagger cagey black-market under-the-table sneak sneaking arcane feline dissembled cryptic covert confidential concealed closet clandestine background hidden hugger-mugger incognito sly slinking skulking shifty secretive secret privy private occult