0 a large, round stone that is turned by a machine and is used to make tools sharper or sharp edges smooth -- 磨石，砂輪
But what, as such, is the ' ' grindstone ' ' here?
The file-makers used water-powered grindstones and the use of water power was only an option in one part of the town.
For instance, we have the case of an abrasive wheel, a hand-operated grindstone, which burst, which is a well-known risk, something which is foreseeable.
These people are at the grindstone and are grappling with the day-to-day and the hour-to-hour problems of business.
Our noses are pressing themselves willingly to the grindstone.
I think that girls doing well helps to keep boys' noses to the grindstone.
It is the voluntary bodies who have their ears to the ground, their noses to the grindstone, or whatever one may call it.
People have their noses too near to the grindstone and are too busy working away to worry about intricate financial opportunities.
