Untrue

false lying deceptive misleading untruthful deceitful wrong inaccurate incorrect untrustworthy disloyal unfaithful cheating faithless perfidious treacherous two-faced dissembling traitorous perjured prevaricating specious erroneous fallacious fictitious sham hollow unsound delusive distorted inexact wide off out of line mistaken inconstant deviant forsworn recreant meretricious apocryphal counterfactual