sly
I
adjective
arch, artful, astute, astutus, calculating, clandestine, conniving, covert, covinous, crafty, crooked, cunning, deceitful, deceiving, deceptious, deceptive, delusive, designing, devious, dishonest, dishonorable, disingeuous, double-dealing, evasive, feline, foxy, furtive, guileful, hidden, insidious, intriguing, keen, obreptitious, plotting, scheming, secret, secretive, sharp, shifty, shrewd, skulking, slippery, sneaking, sneaky, stealthy, subdolus, subtle, surreptitious, treacherous, tricky, uncandid, undercover, underhand, underhanded, unscrupulous, vafer, vulpine, wily
II
index
artful, covert, deceptive, devious, disingenuous, furtive, insidious, machiavellian, mendacious, secret, stealthy, subtle (insidious), unscrupulous
Burton's Legal Thesaurus.
William C. Burton.
2006