Bulgarian Pronunciation IPA(key): [ˈbɔjo̟] Syllabification(key): бо‧ю Hyphenation(key): бою Noun бо́ю • (bóju) m vocative singular of бой (boj) Russian Pronunciation бо́ю: IPA(key): [ˈbojʊ] бою́: IPA(key): [bɐˈju] Noun бо́ю • (bóju) m inan or m anim dative/partitive singular of бой (boj) Noun бою́ • (bojú) m inan locative singular of бой (boj)Wikiwand - on Seamless Wikipedia browsing. On steroids.