clandestine Definition

covert, secret, undercover, surreptitious, underground, cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, on the quiet, illicit, secretive, secretly, shadowy, illegal, unauthorized, smuggled, hidden, undeclared, secrets, secrecy, unrecorded, unlawful, unauthorised, confidential, bootleg, private, disguised, occult, unreported, classified, undocumented, irregular, incommunicado, backdoor, ulterior, unofficial, unmarked, undisclosed, black, closed, confidentiality, company, privacy, back-channel, back-street, closed-door, serri, sri, furtive, nefarious, subversive, supersecret, stealthy, sinister, shady, conspiratorial, contraband, subterranean, paramilitary, devious, backroom, mysterious, untraceable, unsanctioned, backstair, clancular, black operation, in secret, clancularly, deniable, secretist, terrorist, unsecret, compartmented, irangate, spyism, obreptitious, mossad, gunrunning, tectly, disserving, in petto, discreet, open secret, semipublic, uncandid, counterterrorist, militant, night letter, unethical, extralegal, treasonous, disreputable, seditious, huji, jihadi, backstreet, anticommunist, murderous,