'Pada' means feet, 'ut' means intense and 'tan' means to stretch, while 'asana' is pose or posture. All put together it means intense leg or foot stretch. Usually, it is referred to as the Prasarita Padottanasana, where 'prasarita' again means to extend. It can be explained as a Standing Forward Bend or Forward Bend Yoga and is one of the fundamental standing postures in Ashtanga Vinyasa Yoga.