1. to make or become rough or rougher in texture or surface
Usage: third person singular present tense of ‘roughen’

Examples

• The sandpaper roughens the wood surface before painting.
• Cold weather roughens her skin during winter.
• The constant use roughens the fabric over time.
• Wind and rain roughens the bark of old trees.
• The chef roughens the dough by kneading it vigorously.
• Age roughens his voice and makes it deeper.