IPA: /rɪˈvɛndʒfəl/
KK: /rɪˈvɛndʒfəl/
The characteristic of wanting to get back at someone for a wrong done to you; a desire for revenge.
Her revengefulness made it hard for her to forgive those who had hurt her.
Revengefulness → It is formed from "revenge" (from Old French *revenchier*, meaning to take vengeance) and "-fulness" (meaning the state of being full of). The word "revengefulness" means the state of being full of a desire for vengeance.
Think of being 'full of' a desire for 'vengeance' — that's what revengefulness means.