From Proto-Balto-Slavic *bardā́ˀ (with lengthening: *-àr- > -ā̀r-), from Proto-Indo-European *bʰardʰéh₂ (“beard”), from the stem *bʰar- (“projecting forward; tip, point; bristle, awn”), which is perhaps a form of *bʰer- (“to cut, to grate, to split, to hit”). Cognates include Lithuanian barzdà (< *barzdā-, a parallel form of *bardā-, with an extra z perhaps because of d:zd phonetic variation), Old Prussian bordus, Proto-Slavic *borda (Old Church Slavonic брада (brada), Russian борода (boroda), Czech brada (“beard, chin”), Polish broda (“beard, chin”)), Proto-Germanic *bardaz (German Bart, English beard), Latin barba (< *farβā) (French barbe, Italian barba).