Machiavellian

machiavellian adjective arch, artful, base, cagey, calculating, canny, cheating, clever, collusive, collusory, conniving, conscienceless, contriving, corrupt, covinous, crafty, crooked, cunning, deceitful, deceiving, deceptive, delusive, designing, devious, dirty, dishonest, dishonorable, double-crossing, double-dealing, double-tongued, evasive, faithless, falsehearted, feline, foxy, fraudulent, guileful, hypocritical, ignoble, immoral, infamous, insidious, insincere, intriguing, knavish, mean, misdealing, opportunist, perfidious, plotting, rascally, roguish, scheming, shady, shameless, sharp, shifty, shrewd, slick, slippery, sly, smooth, sneaking, sneaky, stealthy, subdolous, tortuous, treacherous, trickish, tricky, two-faced, undependable, underhand, unethical, unprincipled, unscrupulous, untruthful, venal, vile, vulpine, wily

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See also: artful