The superficial similarity between this word and the words aizto(“knife”), aitzur(“hoe”) and aizkora(“ax”) was taken by some as an indication that the language dated to the Neolithic, when those tools would have been made of stone,[1][2] but Trask dismisses this idea on the grounds that Roncalese has a nasal in ai(n)zto and ai(n)tzur but not in haitz.[3] (Aizkora may be a borrowing from Latin.)