It is the 1st or 3rd person singular preterite imperfect indicative form of the verb to yantar, old Spanish, which means eating. This word comes from the Latin verb ientare ientavi ientatum locksets for breach: breakfast and ientaculum ientaculi: breakfast. Says the Archpriest of Hita in the loves of don Melon and Doña endrin from the book of good love: then was Santiago, another next day, / vinose Doña endrin with the my sabiente old / at the time of noon, when yantaba people. / came with her at his home well asosegadamente.