Where does “fiar” come from?

fiar (Old Occitan) comes from Vulgar Latin fidare, from Latin fīdō, from Proto-Italic feiðō, from Proto-Indo-European bʰéydʰeti, from Proto-Indo-European bʰeydʰ- — to compel, force; to trust.

Ancestry of “fiar”, step by step

fiar traces back through two separate lines of ancestry.

via Vulgar Latin fidare

StepLanguageWordMeaning
1Vulgar Latinfidare
2Latinfīdōto trust, put confidence in
3Proto-Italicfeiðōto trust
4Proto-Indo-Europeanbʰéydʰetito trust
5Proto-Indo-Europeanbʰeydʰ-to compel, force; to trust

via Latin fīlāre

StepLanguageWordMeaning
1Latinfīlāre
2Latinfīlumthread, string, filament, fiber
3Proto-Italicfī(s)lom
4Proto-Indo-EuropeangʷʰiH-(s-)lo-

Words derived from “fiar

Every word from Proto-Indo-European bʰeydʰ-Every word from Proto-Indo-European bʰéydʰetiEvery word from Proto-Italic feiðō