高温

1. Origins, structure, and basic meaning

• Structure: 高温 is read as こうおん and is a noun for a high temperature or high-temperature state.
• Basic usage: Melting metal at high temperature appears in 高温で金属を溶かす, while a room becoming very hot appears in 部屋が高温になる.

2. Common pitfalls and similar expressions

• Condition and change of state
  • Use で for the operating condition and になる for a change of state.
• Difference from 暑い
  • 高温 focuses on an objectively high temperature rather than felt heat.