This is the 6519th most frequent Korean word.
열을
"열을" means "heat" or "fever" in English, depending on context.
In this sentence, '열을' means 'effort' or 'passion', indicating enthusiasm and dedication towards an activity.
그녀는 공부에 열을 올리고 있어요.
She is putting effort into her studies.
In this context, '열을' refers to 'heat', indicating the physical temperature.
뜨거운 여름날, 열을 조심해야 해요.
On hot summer days, one should be cautious of heat.
Here, '열을' signifies 'excitement' or 'passion' that something arouses in people.