单词	whetstone
释义	whetstone /ˈwɛtstəʊn / noun A fine-grained stone used for sharpening cutting tools.Larger whetstones for sharpening iron tools were an important part of everyday equipment and were widely traded, especially since varying degrees of coarseness were required to produce a finely honed edge.... The word cos is Latin for whetstone, a stone for sharpening razors and tools. He nodded and continued sharpening swords with whetstones.
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