Why is it called a whetstone?

Excuse me, could you possibly elaborate on the origin of the term "whetstone"? I'm quite intrigued by its naming convention and am wondering if there's a specific reason or historical context behind it. Is it perhaps related to the stone's ability to sharpen or refine, much like how a whetstone sharpens a blade? Or is there another story altogether? I'd greatly appreciate any insight you could offer on this matter.