Complex sentence: The word "agrafa" literally translates to "unwritten" or uncharted; because the Turks were unable to conquer this region, the area and its population were not recorded in the Sultan's tax register.
Split into simpler sentences: The word "agrafa" literally translates to "unwritten" or uncharted. Because the Turks were unable to conquer this region, the area and its population were not recorded in the Sultan's tax register.