IPA: //ˈræθfəl.nəs//
KK: /ˈræθfəl/
The state or quality of being very angry or filled with intense rage.
His wrathfulness was evident when he learned about the betrayal.
Wrathfulness is formed from "wrath" (from Old English "wræþþa", meaning intense anger) and "-fulness" (meaning the state of being full of). The word describes the state of being full of wrath or intense anger.
Think of 'wrath' as intense anger and '-fulness' as being full of something — so 'wrathfulness' means being full of anger.