cahoot, clandestine, collusion, dastardly, disingenuous, eavesdrop, fabricate, fraudulent, furtive, glib, guile, hypocrisy, insidious, invasive, machiavellian, malign, malinger, mendacious, misinformation, peculate, perfidious, pernicious, pestilent, phony, prevaricate, profligate, quisling, renege, skullduggery, sociopath, spurious, sully, tainted, tarnish, traduce, treacherous, wangle, wily