石臼

1. Origins, structure, and basic meaning

• Structure: 石臼 is a noun read いしうす, meaning a stone mill or mortar used to grind or pound beans and grain.
• Basic usage: Use 石臼で豆を挽く when it serves as a tool and 古い石臼が展示される when one is displayed as an object.
  • 祖母は石臼で豆をゆっくり挽きました。 describes a grandmother slowly grinding beans with a stone mill; 資料館の庭に古い石臼が展示されています。 says that an old stone mortar is displayed in the museum garden.

2. Common pitfalls and similar expressions

• 石臼で挽く
  • で marks the stone mill as the tool used to grind the beans.
• 石臼が展示される
  • In the passive form, が marks the stone object being displayed.
• 庭に
  • に marks the museum garden as the display location.