(a.) Full of guile; characterized by cunning, deceit, or treachery; guilty.

Byzantine Machiavellian Machiavellic acute arch artful astute cagey calculating canny chiseling clever collusive covinous crafty cunning cute deceitful deep deep-laid designing devious diplomatic duplicitous FALSE falsehearted feline finagling foxy fraudulent furtive indirect ingenious insidious inventive knowing pawky politic ready resourceful scheming serpentine sharp shifty shrewd slick slippery sly smooth snaky sneaking sneaky sophistical stealthy strategic subtile subtle supple surreptitious tactical treacherous trickish tricksy tricky two-faced underhand underhanded vulpine wary wily