Roughen/ˈrʌfn/ Definition 1 of 2Pro Tip 1/3Texture Change Use 'roughen' to describe changes from smooth to a more textured surface due to various causes. Years of walking roughened the stone pathway. Pro Tip 2/3Physical Impact 'Roughen' often hints at physical action that alters a surface, like rubbing or scratching. Sanding the wood will roughen its finish. Pro Tip 3/3Negative Outcome When 'roughen' describes skin or other surfaces, it suggests an undesirable effect. Frequent hand washing roughened her delicate skin.