Un·truth·ful a. Not truthful; unveracious; contrary to the truth or the fact. -- Un*truth*ful*ly, adv. -- Un*truth*ful*ness, n.
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  untruthfully
       adv : in a mendacious and untruthful manner; "I told him, quite
             untruthfully, that I had just returned from leave"
             [syn: mendaciously] [ant: truthfully]