Plural of zulo, late basqueness mediated by the almost daily presence of the terrorism of eta in the media at the end of the 20th century and early 21st, as in Basque it means hole, usually underground cache, site to hide things and for the Royal Academy is a hidden and underground, carrier if you are in the countryside, to hide weapons or something illegal or to retain people kidnapped for political or economic purposes. The influence of the Basque on the incipient Castilian was important as evidenced by the works of Gonzalo de Berceo and until the cantar de Mio Cid, however this communication broke from the 16th century, I don't know why. Let's see if we recover the lost time.
