unit of length

1. Origins, structure, and basic meaning

• Structure: 寸 is associated with length; its on-reading is すん.
• Basic usage: 寸法(すんぽう) means dimensions, while 寸前(すんぜん) means just before something happens.

2. Common pitfalls and similar expressions

• Physical dimensions and the moment before an event
  • 壁の寸法 means a wall's dimensions, while 図面の寸法 means the dimensions shown on a drawing. They are used when ordering an item or comparing its actual size.
  • 発車寸前 means just before departure, focusing on an imminent event.