急須

1. Origins, structure, and basic meaning

• Structure: 急須, read きゅうす, is a teapot in which tea leaves are steeped with hot water.
• Basic usage: It appears in contexts involving adding tea leaves and water or discussing a tea utensil passed down in a family.

2. Common pitfalls and similar expressions

• Use compared with やかん
  • やかん is mainly a kettle for boiling water; 急須 is for steeping tea. The distinction is between heating water and brewing tea.