IPA: /rɪˈvɛndʒfəl/
KK: /rɪˈvɛndʒfəl/
Having a strong desire to get back at someone for a wrong done to oneself.
He was filled with revengeful thoughts after being betrayed by his friend.
Revengeful → It is formed from "revenge" (from Old French *revenchier*, meaning to take vengeance) and "-ful" (meaning full of). The word "revengeful" means full of the desire to take vengeance.
Think of someone who is 'full of' ('-ful') the desire to 'take vengeance' ('revenge').