köken: From Middle High German hasinscharte. By surface analysis, Hase (“hare”) + -n- + Scharte (“notch”). So called because of the similarity to the outer form of a hare’s lip. Compare already Old English hærsceard.
köken: From Old Galician-Portuguese bico (13th century, Cantigas de Santa Maria); either from Latin beccus from Gaulish *beccos (“chicken beak”) interfered by picar, or directly from Paleo-Hispanic; ultimately from Proto-Celtic *bekkos (“hook”).
aile: bica, bicada, bicar, bicudo, biquela, biquiño, ter bo bico, torcer o bico
-Ai que rico mazarico! / quen che deu tamaño bico? / -Deumo Deus e meus pecados, / que non os teño ben purgados
Meniña, se che pesou / polos bicos que me deches, / devólveme os que che eu dei / e dareiche os que me deches
deralle cõ aquela seeta por la queixada seestra e foralle por medeo da cabe[ç]a, et o biquo dela foralle ferir ẽna nariz.
köken: From bearna (“gap”) + míl (genitive singular of míol (“animal; hare”)). The pronunciation given by Finck for Aran Irish suggests a confusion with either bearna bhaoil (“gap of danger, the breach”) or bearna mhaol (“a gap not closed up to the usual height”, literally “bald gap”)