un ‧ truth ‧ ful /ʌnˈtruːθf ə l/ BrE AmE adjective
[ Word Family: adverb : ↑ truly , ↑ truthfully ≠ ↑ untruthfully , ↑ true ; noun : ↑ truth ≠ ↑ untruth , ↑ truthfulness ; adjective : ↑ true ≠ ↑ untrue , ↑ truthful ≠ ↑ untruthful ]
dishonest or not true
—untruthfully adverb