The term "rough surface" refers to a textured or uneven surface that is not smooth. This can include surfaces with bumps, ridges, grooves, or other irregularities that make it difficult to traverse or move across without slipping or causing damage. Rough surfaces are often found in nature such as rocks, tree trunks, and stony ground, but they can also be man-made, for example, concrete sidewalks with cracks or bricks with uneven edges. The term is commonly used to describe the texture of a surface rather than its composition, so even smooth surfaces that appear rough due to scratches or scuffs may be referred to as "rough."