Why do they call womens shoes pumps?

Pumps are a type of shoe that typically have a closed toe, a high heel, and a low cut front. They are often worn by women for formal or semi-formal occasions. The term "pump" is thought to have originated in the 18th century, when shoes with a similar shape were called "pomps" or "pompoms". These shoes were often made of fabric and had a rounded toe, and they were popular among both men and women. Over time, the term "pump" came to be used exclusively for women's shoes, and the style evolved to include the high heel and low cut front that are characteristic of modern pumps.