The story
- Proto-West Germanic · inherited from*fijandskapi
- Old English · inherited fromfēondsċiepe
- Middle English · inherited fromfeondscipe
- English todayfiendship
From Middle English feondscipe, from Old English fēondsċiepe, from Proto-West Germanic *fijandskapi, equivalent to fiend + -ship.
Etymology from Wiktionary, CC BY-SA 4.0.