unfaithfully

/ʌnˈfeɪθfəli/
adverb
  1. In a way that is not loyal or trustworthy, especially in a romantic relationship.
    • The knight was accused of serving his king unfaithfully.
    • He unfaithfully broke every promise he made to his friend.
    • She acted unfaithfully by hiding her secret meetings from her partner.
  2. In a way that is not accurate or true to the original.
    • The witness described the events unfaithfully, mixing up key details.
    • The translator rendered the poem unfaithfully, losing its original rhythm.
    • The copy machine reproduced the colors unfaithfully, making them too dark.