禁煙

1. Origins, structure, and basic meaning

• Structure: 禁煙, read きんえん, means prohibiting smoking or refraining from smoking.
• Basic usage: Both examples describe a place's no-smoking rule.

2. Common pitfalls and similar expressions

• Scope of the ban
  • In the example, この建物の中はすべて禁煙です says that smoking is prohibited throughout the building.
• Action and rule
  • 喫煙 means the act of smoking, while 禁煙 here is a rule that does not allow that act.