閉鎖

1. Origins, structure, and basic meaning

• Structure: 閉鎖 (へいさ) means closing a facility or service to use. The examples show passive closure and active shutdown.
• Basic usage: An aging bridge is closed for safety; a company closes a lightly used service counter.

2. Common pitfalls and similar expressions

• Infrastructure closed for safety and service ended for low use
  • The passive subject is 橋は; the active object is 窓口を. Their reasons are safety and demand respectively.