undercover Definition

clandestine, covert, surreptitious, secret, underground, cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, on the quiet, narcs, narc, illegal, incognito, unmarked, anonymous, disguised, agent, officer, secretive, journalist, confidential, hidden, inside, infiltration, classified, confidentiality, secrecy, submarine, civilian, cover, couverture, irregular, lid, invisible, backdoor, way, seepage, low, civil, hedging, coverage, blanket, plain-clothes, cap, plainclothes, illicit, furtive, shady, investigative, fugitive, narcotic, shadowy, contraband, whistleblower, underage, backstair, videotaped, in secret, clancular, private detective, black operation, secretist, intelligence agent, spyism, clancularly, seedy, sting operation, alleged, obreptitious, unsecret, unlicensed, unwitting, sadomasochistic, open secret, unmasked, pornographic, unsuspecting, topless, sleazy, unidentified, uniformed, fake, still hunt, unnamed, intelligence activity, unknowing, counterfeit, unarmed, incriminating, government agent, gunrunning, anticryptic, lie in wait, stealingly, uncandid, tectly, lewd, house detective, phony,