The term slowly wear away can be summarized by the crossword solution 'ERODE, ' which is a five-letter word. Erosion is a natural process in which soil, rocks, and other materials are worn away by wind, water, or other natural forces. Over time, these forces can cause gradual changes to the landscape, such as the formation of valleys, canyons, and other features. Erosion can also occur more quickly due to human activities, such as deforestation and construction.