1. makes or becomes sharp or sharper
Usage: third person singular present tense of ‘sharpen’
2. makes or becomes more intense, focused, or clearly defined
Usage: figurative use

Examples

• She sharpens her pencils before every test.
• The chef sharpens his knives daily.
• Exercise sharpens the mind.
• The debate sharpens the differences between the candidates.
• Cold weather sharpens your appetite.
• Practice sharpens your skills over time.