参戦

1. Origins, structure, and basic meaning

• Structure: 参戦 is read as さんせん and means entering or participating in a conflict, competition, or event.
• Basic usage: It can describe a country entering a battle or an athlete competing in a championship.

2. Common pitfalls and similar expressions

• Entering a conflict
  • 戦いに参戦する means that a country or group joins an ongoing fight. Example: 物語では隣国も戦いに参戦した。
• Competing in an event
  • In sports, 大会に参戦する means that an athlete enters the competition. Example: 経験豊富な選手が決勝大会に参戦する。