Translation guide
A grindstone is a stone wheel used for sharpening tools or grinding materials. In Japanese, the word varies depending on whether it is a rotating wheel, a handheld stone, or used in idiomatic expressions.
A stone wheel that turns to sharpen blades or tools.
General term for a sharpening stone, including both rotating wheels and handheld whetstones. Often used for grinding wheels in workshops.
This grindstone is used for sharpening blades.
Specifically a grinding wheel for polishing or finishing surfaces. More technical.
Smooth the metal surface with a grinding wheel.
Loanword for an electric grinder or grinding machine, often with a rotating stone. Common in DIY and industrial contexts.
I cut the iron pipe with a grinder.
A small, portable stone used for sharpening knives or tools by hand.
Same word as above, but context distinguishes handheld from wheel. Very common for kitchen knife sharpening.
I bought a whetstone to sharpen my kitchen knife.
Loanword for a knife sharpener, often a handheld device with abrasive slots. Not a traditional stone, but serves the same purpose.
Working hard and continuously, often with a sense of drudgery.
Means to work with complete concentration and dedication, similar to 'keep one's nose to the grindstone.'
He kept his nose to the grindstone and got promoted.
To work steadily and diligently, like 'plug away' or 'keep at it.' Less intense than 一心不乱.
Literally 'work until your body turns to powder,' meaning to work extremely hard, often to exhaustion. Stronger and more dramatic.
The English idiom 'nose to the grindstone' has no direct Japanese equivalent using a grindstone. Use phrases about hard work instead. A literal translation like 鼻を砥石に would be meaningless.
このシャープナーは簡単に使える。
This sharpener is easy to use.
I kept my nose to the grindstone every day and achieved my goal.
He worked his fingers to the bone for his family.