The term 'curved part of the foot' refers to the ARCH of the foot, which is a four-letter word. The ARCH of the foot is a curved structure that runs along the bottom of the foot and helps to support the body's weight when standing or walking. It also helps to absorb shock when the foot strikes the ground. The ARCH is made up of several bones, ligaments, and tendons, and it can be seen when standing on tiptoes.