Now we are going to deal with the white colour (zuri), to close the trilogy that we started with red (gorri), and continued with black (beltz). Not surprisingly, these three colours are, following the Scottish anthropologist Victor Turner, those that synthesize the symbolism of primitive human being, manifesting in dual opposition. As he tells us in his book The Forest of Symbols, from the contrast of the colours white and red, or black and white, all the rites of primitive societies can be explained, and of course, the Basque would not be an exception.
From the point of view of the language, the etymology of zuri (white) is not transparent, but it seems that most philologists agree, since Azkue, in relating it to wood (zura), and more specifically to the internal part of the tree trunk, which is usually whitish in colour.