भाई • (bhāī) m (Urdu spelling بھائی)
From Prakrit, from Proto-Indo-Aryan *bʰrā́tr̥, akin to Sanskrit भ्रातृ (bhrā́tṛ), from Proto-Indo-Aryan *bʰrā́tr̥, from Proto-Indo-Iranian *bʰrā́tar-, from Proto-Indo-European *bʰréh₂tēr (“brother”). Cognates include Persian برادر (barâdar), Ancient Greek φράτηρ (phrátēr), Latin frāter, Old Norse bróðir and Old English brōþor (English brother).