Proto-Basque: *urdi-n, *burdina (or *b=urdina)
Meaning: 1 blue 2 gray (haired) 3 turbid, murky (water) 4 mold, mildew 5 dirty 6 fine, satiny (tint) 7 iron
Araban: burnia 7
Bizkaian: urdin 1, 2, 4, 6, burdiña, burriña 7, (arc) burnia, burdĩa 7
Gipuzkoan: urdin 1, 2, burnia 7
High Navarrese: urdin 1, 2, 4, burdiña, burriña 7
Low Navarrese: urdin 1, 2, 4, 5, burdina, burdiña 7
Salazarese: urdin 3, 5, burriña, burña 7
Lapurdian: urdin 1, 2, burdina 7
Baztanese: burdine 7
Aezkoan: burdina 7
Zuberoan: urdin 1, 2, 3, bürdǘña 7
Roncalese: urdin 1, 2, 3, 5, burduña, burruña, burña 7
Comments: The connection of 'blue' and 'iron' is also found in PNC *nHǟƛ̣_wV̆ 'blue; (blue metal) > iron', in this analysis cognate (by metathesis) with the Bsq words here.
