He missed school because he had a fever.

He is heating up the coffee.

His flaring up again means that he is immersing himself in that hobby again.

His passion for the game flared up again.

The heat is intense today, it's hard to go outside.

His passion for music is incredible.

He is studying thermodynamics in depth.

Lassa fever is a serious infectious disease that is particularly prevalent in West Africa.

His enthusiastic cry livened up the entire venue.

His dream is to fly in the sky in a hot-air balloon.