walnut
Refers to the walnut tree or its nut, especially the common walnut (Juglans regia).
My father used a tool to crack open the walnut.
Crack open a walnut and take out the kernel.
This bread has a lot of walnuts in it.
You peel the shell off the walnut to get the flesh inside.
For long, thin objects (sticks, stems, wires, bottles); also 'pieces' like films, articles, and phone calls.
Usually written in kana; the kanji form 胡桃 is also used but less common.
Katakana spelling, often used in botanical or culinary contexts.
Kanji spelling, less common than kana; may appear in literary or formal contexts.
The origin is uncertain; possibly related to くるむ (to wrap) due to the shell enclosing the nut, but this is speculative.