1. the process of making or becoming rough or rougher

1. present participle of roughen; making or becoming rough or rougher

Examples

• The roughening of the wood surface made it perfect for painting.
• Years of weather caused a gradual roughening of the stone walls.
• The sandpaper is roughening the metal before we apply the primer.
• She noticed the roughening of her hands after working in the garden.
• The roughening process helps the adhesive bond better.
• Wind and rain are roughening the smooth cliff face over time.