The term 'MOUNTAIN' can be broken down into two prefixes: OREO and ORO. OREO is a four-letter prefix meaning 'MOUNTAIN' while ORO is a three-letter prefix meaning 'MOUNTAIN'. Both of these prefixes are derived from the Latin word 'mons', which means 'MOUNTAIN'. Mountains are large landforms that rise above the surrounding land, typically reaching heights of over 1, 000 meters. They are often formed by tectonic plates pushing against each other, causing the land to rise up. Mountains are home to many different species of plants and animals, and they provide a variety of recreational activities for people.