A polo ground is a large, open area of land used for playing the sport of polo. It is typically rectangular in shape and is usually bordered by a fence or wall. The term 'polo ground' is derived from the Persian word 'pulu, ' which means ball. ORIENT is a 6-letter word meaning the eastern part of the world, particularly ASIA. ASIA is a 4-letter word referring to the largest continent on Earth, located primarily in the Eastern and Northern Hemispheres.