Where does “fiel” come from?

fiel (Old French) comes from Latin fel, from Proto-Indo-European ǵʰelh₃- — to flourish; green, yellow.

Ancestry of “fiel”, step by step

StepLanguageWordMeaning
1Latinfelgall bladder; gall, bile; poison
2Proto-Indo-Europeanǵʰelh₃-to flourish; green, yellow
Every word from Proto-Indo-European ǵʰelh₃- →Every word from Latin fel →
fiel — Etymology, Origin & Word History | Etymology Explorer