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
Exempel
After being betrayed by her closest friend, she decided to harden her heart to protect herself from further emotional pain.
In his line of work, he had to harden his heart to the suffering he witnessed daily in order to maintain his professionalism.
