Complex sentence: A kirtle (sometimes called cotte, cotehardie) is a garment worn by men and women in the Middle Ages or, later, a one-piece garment worn by women from the later Middle Ages into the Baroque period.
Split into simpler sentences: A kirtle (sometimes called cotte, cotehardie) is a garment that was worn by men and women in the Middle Ages. It eventually became a one-piece garment worn by women from the late Middle Ages into the Baroque period.