Definition of untruthful adjective from the Oxford Advanced American Dictionary

     

    untruthful

     adjective
    adjective
    NAmE//ʌnˈtruθfl//
     
     
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  1. 1saying things that you know are not true opposite truthful
  2. 2 The allegations make her out to be untruthful. an untruthful statement
untruthfully
 
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NAmE//ʌnˈtruθfəli//
 
adverb
See the Oxford Advanced Learner's Dictionary entry: untruthful