The word for “sincere” in Italian is sincero. “Sin” means “to be without.” “Cero” is the Italian word for wax. It was a term used in the practice of pottery. Artisans would mold a vessel out of clay and place it into a kiln in which the clay would harden under intense heat. Cracks would often form in the vessels as they were pulled from the heat into the cooler air outside of the …