Proto-Basque: *bur(a)ho
Meaning: curse, blasphemy
Bizkaian: birao, birago
Gipuzkoan: birao, (Andoain) birago, (Gabiria, Itziar) irao
High Navarrese: buro, burro
Low Navarrese: (Aldude) burho
Lapurdian: burho, buro
Zuberoan: burhau
Comments: Cf. the similar phonetic development of *buɫhar̄ 'breast, chest' < *burha-r̄ < *Gwălɦē. Cf. also ZBR bürhói 'brusque, rude'; ? (with -l- preserved) (ZBR-arc) bilha-ka ‘fight, struggle’, bilha-kaide ‘fight, discord’; ‘hatred, enmity, quarrel, argument’. The relationship of RNC irago, idago 'cry, clamor' and GIP irao is unclear - a different etymon contaminated with *bur(a)ho?
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