backstair Definition

covert, furtive, clandestine, in secret, clancular, subreption, secret, obreptitious, surreptitious, secretive, clancularly, unsecret, uncandid, secretist, surreption, stealthy, ultrasecret, black operation, open secret, undercover, cloakedly, stealthful, thievishly, sneaky, secrecy, stealingly, spyism, spy, shadowy, wall of silence, intelligence agent, tectly, espionage, anticryptic, conspiracy of silence, subterfuge, stealth, sinister, insidiate, insidious, scyle, obreption, underhanded, illicit, devious, mysterious, nefarious, latitant, creepingly, discovert, badger game, deception, miching, in petto, latescent, slyboots, epopt, sleighty, undisclose, cautelous, prodition, scandalousness, conceal, shadowish, machination, night letter, underhand, vafrous, subingression, shady, hide, treachery, supercherie, undiscreet, sub rosa, conspiratorial, supersecret, sneak, mysterize, lie in wait, covinous, eavesdrop, sordid, fraudful, deceit, confidential, intelligence activity, subdolous, cunning, cia, umbratile, in private, uncover, sly, umbrose, underdealing, collusion, duplicity, beswike, backroom,