1. Not trustful or trusting.

2. Not to be trusted; not trusty. [R.] Sir W. Scott.

UNTRUTH
Un*truth", n.

1. The quality of being untrue; contrariety to truth; want of veracity; also, treachery; faithlessness; disloyalty. Chaucer.

2. That which is untrue; a false assertion; a falsehood; a lie; also, an act of treachery or disloyalty. Shak.

Syn.
— Lie; falsehood. See Lie.

UNTRUTHFUL
Un*truth"ful, a.

Defn: Not truthful; unveracious; contrary to the truth or the fact.
— Un*truth"ful*ly, adv.
— Un*truth"ful*ness, n.

UNTUCK
Un*tuck", v. t. Etym: [1st pref. un- + tuck.]

Defn: To unfold or undo, as a tuck; to release from a tuck or fold.