sharpen
/ˈʃɑrpən/
verb
- To make something (such as a blade, pencil, or tool) have a thin, pointed, or cutting edge.
- He used a whetstone to sharpen the kitchen knife.
- The barber sharpens his straight razor every morning.
- Please sharpen your pencil before the test.
- To improve or make something more effective, clear, or intense.
- The debate helped sharpen her arguments.
- Practicing puzzles can sharpen your mind.
- The photographer sharpened the image using editing software.
- To become sharper or more intense.
- His focus sharpened when he heard the news.
- As the storm approached, the wind sharpened.
- The pain in her knee sharpened after the long run.