CIAHUIZTICA by fatigue / con mi fatiga ( C for possessed form ) [(1)Cf.49r]. This pairs with the instrumental form TLATEQUIPANŌLIZTICA ( both elements in possessed form) to form a construction with the sense of the English phrase ‘by the sweat of one’s brow.’ See CIAHUIZ-TLI, -CA. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 33.