Janus-like Machiavellian ambidextrous artful bifacial bifold biform bilateral binary binate biparous bivalent calculating chiseling collusive conduplicate covinous crafty crooked cunning deceitful dishonest disomatous double double-dealing double-faced double-minded double-tongued doublehearted dual duple duplex duplicate duplicitous faithless FALSE false-principled falsehearted finagling fraudulent furtive geminate geminated guileful indirect insidious perfidious scheming second secondary sharp shifty slippery sneaky surreptitious treacherous trickish tricky twin twinned two-level two-ply two-sided two-story twofold underhand underhanded wily