「熱い」　Used to describe the state that matter temperature is high （熱いコーヒー、体が熱い）and also psychological state of being excited or passionate. （熱い男、熱い視線、熱い議論） Antonym: 冷たい 「暑い」　Used to describe the state that air temperature is high. （暑い夏、蒸し暑い） Antonym: 寒い