knavishly

/ˈneɪvɪʃli/
adverb
  1. In a dishonest, roguish, or mischievous manner.
    • She knavishly altered the documents to avoid blame.
    • He winked knavishly as he hid the last cookie.
    • The merchant knavishly overcharged the tourists.
Antonyms
What does "knavishly" mean? | whatsthatwordmean | whatsthatwordmean