This is the 15076th most frequent Korean word.
발열을
"발열을" means "fever" or "heat generation."
In this sentence, '발열을' is used to refer to experiencing a fever, often due to health reasons.
그는 발열을 느낄 때 차가운 물로 열을 내리곤 했습니다.
He would cool down the fever with cold water whenever he felt it.
Here, '발열을' refers to the generation of heat by a device or machine as a result of extended operation.
기계가 오랜 사용으로 발열을 일으켰어요.
The machine generated heat after prolonged use.
In this sentence, '발열을' represents a fever or overheating that is targeted for reduction by the medicine.