1. to make or become harsh, rough, or severe
Usage: third person singular present tense of ‘harshen’

Examples

• The cold wind harshens her skin.
• His voice harshens when he’s angry.
• The winter weather harshens the landscape.
• Time harshens the edges of old photographs.
• The critic’s tone harshens as the review continues.
• Exposure to chemicals harshens the fabric over time.