Possible Questions:
- Sharpen
- Stimulate
- Pique
- Put an edge on
- Arouse
- Hone
- Give an edge to
- Perk up
- Make sharper
- Give an edge
- Stimulate, as an appetite
- Sharpen, as a knife
- Use a strop on
- Sharpen, as an appetite
- Sharpen by grinding
- Stimulate, as the appetite
- Sharpen, as a blade
- Put a sharper edge on
- Improve, as an edge
- Improve the edge of
- Excite, as an appetite
- Trigger, as an appetite
- Stimulate, as one's appetite
- Stimulate (the appetite)
- Spark, as an appetite
- Sharpen by rubbing
- Sharpen a knife
- Pique, as one's appetite
- Pique, as interest
- Pique, as an appetite
- Perk up, as an appetite
- Be an appetizer for
- ___ one's appetite