barre.

From Middle French barre, from Old French barre (“beam, bar, gate, barrier”), from Vulgar Latin *barra, of uncertain origin. Perhaps from Old Frankish *bara (“bar, beam, barrier, fence”), from Proto-Germanic *barō (“beam, bar, barrier”), from Proto-Indo-European *bʰerH- (“to strike, pierce”). If so, then cognate with Old High German para, bara (“bar, beam, one's cherished land”), Middle Dutch bāre, baer (“bar, barrier, rail”), Old Frisian ber (“attack, assault”), Swedish bärling (“a spoke”), Norwegian berling (“a small bar in a vehicle, rod”), Latin forus (“gangway, plank”), Russian забо́р (zabór, “fencing, paling, fence”), Ancient Greek φάρος (pháros, “piece of land, furrow, marker, beacon, lighthouse”). An alternative etymology derives Old French barre and Vulgar Latin *barra from a Celtic source related to Breton barri (“branch, twig”). Doublet of bar.