Related Clues:

• Sharpen
• Stimulate
• Put an edge on
• Arouse
• Give an edge to
• Pique
• Sharpen, as a knife
• Stimulate, as the appetite
• Sharpen by grinding
• Give an edge
• Sharpen by rubbing
• Perk up
• Hone
• Sharpen, as a blade
• Stimulate, as an appetite