The story
- Proto-Germanic · inherited from*selbawiljô“self-will”
- Proto-West Germanic · inherited from*selbawilljō
- Old English · inherited fromsylfwill
- Middle English · inherited fromself-wil
- English todayself-will
From Middle English self-wil, self-wille, from Old English sylfwill, selfwill, selfwille (“self-will”), from Proto-West Germanic *selbawilljō, from Proto-Germanic *selbawiljô (“self-will”), equivalent to self- + will. Cognate with Old High German selbwillo, selpwillo, Old Norse sjalfvili.
Etymology from Wiktionary, CC BY-SA 4.0.