Definition
To be "roughened" means to have become coarse or uneven, losing smoothness. Think of a polished table that's been scratched โ it's been roughened. It's a change in texture, often caused by wear, weather, or some kind of abrasive force. Unlike naturally rough surfaces, "roughened" implies a previous state of smoothness. Imagine sandpaper โ it's designed to roughen surfaces, but a rock can be naturally rough.