IPA: /rɪˈvɛnʤfəli/
KK: /rɪˈvɛnʤfəlɪ/
In a way that shows a desire to harm someone in return for a wrong done to oneself.
She acted revengefully after being betrayed by her friend.
Revengefully → It is formed from "revenge" (from Old French *revenchier*, meaning to take vengeance) and "-fully" (meaning full of). The word "revengefully" means full of the desire to take vengeance.
Think of being 'full of' ('-fully') the desire to 'take vengeance' ('revenge'). This helps you remember that revengefully describes someone acting with a strong desire for revenge.