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Whetstone

usgb/ˈwetstəʊn/Volume
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LampPro Tip 1/3
Tool MaintenancePlay
Whetstone is often associated with the care and maintenance of tools. SlideAfter buying a new pocketknife, learn to maintain its edge with a whetstone.
LampPro Tip 2/3
Not for CookingPlay
Despite 'whet' sounding like 'wet', a whetstone is not intended for use in cooking. SlideRemember, a whetstone is for sharpening knives, not an ingredient for your stew.
LampPro Tip 3/3
Metaphorical UsePlay
Used metaphorically, it implies something that enhances or stimulates. SlideChallenging puzzles are a whetstone for the mind.