1. (n.) Double-dealing; deliberate deceptiveness\; a twofold state.

2. (n.) Doubleness of heart or speech; insincerity; a sustained form of deception which consists in entertaining or pretending to entertain one of feelings, and acting as if influenced by another; bad faith.

3. (n.) The use of two or more distinct allegations or answers, where one is sufficient.

4. (n.) In indictments, the union of two incompatible offenses.

Janus Machiavellianism ambidexterity ambiguity ambivalence artfulness artifice bad faith biformity bifurcation conjugation craft cunning deceit deceitfulness dichotomy dirty pool dirty trick dirty work dishonesty dissemblance dissimulation double-dealing doubleness doubleness of heart doublethink doubling dualism duality duplexity duplication equivocality faithlessness falseheartedness falseness foul play furtiveness guile halving hypocrisy improbity indirection insidiousness irony low cunning pairing perfidiousness perfidy polarity shiftiness sneak attack sneakiness surreptitiousness treacherousness treachery twinning two-facedness twoness underhandedness wile