From Sanskritपशु(paśu, “cow, cattle”) +-వు(-vu); from Proto-Indo-European*peḱu-(“livestock, domestic animals”). Cognates include Latin pecus(“cattle”), Old Armenian ասր(asr, “fleece”), Old English feoh, Old Norse fé, Gothic 𐍆𐌰𐌹𐌷𐌿(faihu) and Lithuanian pēkus(“cattle”).