追究

1. Origins, structure, and basic meaning

• Structure: 追究, read ついきゅう, means pursuing an inquiry thoroughly to establish a cause, principle, or responsibility.
• Basic usage: It describes investigating an accident to the end or continuing research into how an unknown phenomenon works.

2. Common pitfalls and similar expressions

• Pursuing causes and mechanisms thoroughly
  • This means investigating an accident's cause or an unknown mechanism through to an answer. The focus is thorough inquiry rather than physically chasing something.