The term 'Wear Down Over Time' can be summarized by the word 'ERODE', which has five letters. Erosion is a natural process that occurs when wind, water, and other elements wear away at the surface of the Earth over time. This process can cause changes in the landscape, such as the formation of valleys, canyons, and other features. Erosion can also occur on a smaller scale, such as when rocks are worn down by the action of waves or when soil is washed away by rain.