捜索

1. Origins, structure, and basic meaning

• Structure: 捜索 is read as そうさく and is a verbal noun for an organized search for a missing person or object.
• Basic usage: It is used for police and residents searching for a missing child or preparing equipment for a nighttime search.

2. Common pitfalls and similar expressions

• Search target
  • In 子どもを捜索する, the missing child is marked with を as the target of the search.
• Preparing for the activity
  • 夜間の捜索に備える treats the nighttime search as an event requiring flashlights and maps, not an information query.