Proto-Basque: *bi=der̄
Meaning: chin
Low Navarrese: (Amikuse) bidar
Zuberoan: bíder
Comments: Some have thought this northeastern word to be a phonetic variant of *bisar̄ ‘beard’ (q.v.), but this is impossible phonetically: ZBR has bízar ‘beard’ opposed to bíder ‘chin’. *bi=rder̄ dissimilated > *bi=der̄; cf. *a=rdar̄ > *a=dar̄ ‘horn’ (q.v.).
