Un*truth" (?), n.
The quality of being untrue; contrariety to truth; want of veracity; also, treachery; faithlessness; disloyalty.
That which is untrue; a false assertion; a falsehood; a lie; also, an act of treachery or disloyalty.
Syn. -- Lie; falsehood. See Lie.
© Webster 1913.