The story
- Latin · derived fromferus“wild", "untamed”
- Old French · derived fromfers“wild", "ferocious”
- Middle English · inherited fromfers
- English todayfierce
From Middle English fers, fiers, borrowed from Old French fers (“wild", "ferocious”), nominative of fer, from Latin ferus (“wild", "untamed”).
Words from the same roots
Middle Englishfers all →
fers
Latinferus all →
ferae naturaeferousfierasfer
Etymology from Wiktionary, CC BY-SA 4.0.