From Middle English brother, from Old English brōþor, from Proto-West Germanic *brōþer, from Proto-Germanic *brōþēr (compare North Frisian Bröðer, West Frisian broer, Dutch broeder, German Bruder, Danish broder, Norwegian bror), from Proto-Indo-European *bʰréh₂tēr (compare Irish bráthair, Welsh brawd, Latin frāter, Ancient Greek φράτηρ, Armenian եղբայր, Tocharian A pracar, Tocharian B procer, Russian брат, Lithuanian brolis, Persian برادر,Northern Kurdish bira, Sanskrit भ्रातृ). frater, friar, and pal.
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