熱中

1. Origins, structure, and basic meaning

• Structure: Spelling: 熱中. Reading: ねっちゅう. Core meaning: absorption; enthusiasm.
• Basic usage: Representative examples: 子どもたちは模型作りに熱中している / 読書に熱中して降りる駅を通り過ぎた.

2. Common pitfalls and similar expressions

• Particle marking absorption
  • 模型作りに熱中する and 読書に熱中する mark the activity one is absorbed in with に. Avoid a literal interpretation involving bodily heat.