grindstone
2 ENTRIES FOUND:
plural
grindstones
plural
grindstones
Britannica Dictionary definition of GRINDSTONE
[count]
:
a stone disc that can be turned like a wheel and that is used for sharpening tools, smoothing rough edges, etc.
nose to the grindstone
◊ If your nose is to the grindstone, you are doing hard, continuous work.
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You'll do well at school if you just keep your nose to the grindstone.
