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Latin word barba comes from Proto-Indo-European *bʰor-, Proto-Indo-European *bʰébʰrus (Beaver.)
*bʰor- (Proto-Indo-European)
*bʰébʰrus (Proto-Indo-European)
Beaver.
*bʰardʰeh₂ (Proto-Indo-European)
Beard.
*farβā (Proto-Italic)
Beard.
*farba (Latin)
barba (Latin)
(figuratively) wool, down on a plant. Beard (facial hair).