이열치열이 · 이열치열을
fighting heat with heat; fighting fire with fire
Example
더운 여름에 이열치열로 뜨거운 삼계탕을 먹어요.
In the hot summer, we eat hot ginseng chicken soup to fight heat with heat.
Word parts
이 by means of+열 heat+치 cure+열 heat
Literally 'cure heat with heat'.
Good to know
Koreans cite it when eating hot soups like 삼계탕 on 복날, the hottest summer days.