Verb
To make rough.
To grow or become rough.
Source: Webster's dictionaryroughen the surfaces so they will stick to each other Source: Internet
If you’re too aggressive with the sandpaper, you might roughen what should be a smooth exterior surface, or you might sand away finely etched details. Source: Internet
Lightly use abrasive paper to evenly roughen up the surface of the shrink plastic. Source: Internet
Roughen or loosen the existing soil surface if your bed is built on compact, slow-draining soil. Source: Internet