roughen
/ˈrʌf(ə)n
/verb
Make or become rough: [with object]: the wind was roughening the surface of the river [no object]: his voice roughened...
- The coarser the powder, the more the grains roughen up the surface for more of a textured finish.
- Virginia's voice had roughened to an angry growl.
- Etching the parts roughens the surface for better mechanical adhesion of the EN to the magnesium.
