to harden one's heart
01
to no longer have kind feelings for a person
![to [harden] {one's} [heart] definition and meaning](https://cdn.langeek.co/photo/44564/original/?type=jpeg "to [harden] {one's} [heart] definition and meaning")
Idiom
예시들
In his line of work, he had to harden his heart to the suffering he witnessed daily in order to maintain his professionalism.
to no longer have kind feelings for a person
Idiom
