Spelling uncertain (hardly legible in Barrenechea); NB: Moreover, in the illustration to his article »The ‘Albogues’ in Spain« (➺ website) Pío Fernández mentions the "Kanaberak-tutuak" [i.e. "the cane pipes"], which seems to render Barrenechea's interpretation of the adjective as a main term rather questionable.

Made of cane [Arundo donax?].