汚染

1. Origins, structure, and basic meaning

• Structure: 汚染 is read as おせん and means pollution or contamination.
• Basic usage: It can identify water contamination shown in an experiment or pollution that villagers seek to prevent in a river.

2. Common pitfalls and similar expressions

• Showing water pollution
  • 汚染: The experiment showed water pollution through a color change. Example: 実験では水の汚染を色の変化で示しました。
• Preventing river pollution
  • 汚染: The villagers in the story discussed ways to prevent river pollution. Example: 物語の村人は川の汚染を防ぐ方法を話し合いました。