nieprzepraszający in English:

It's not that I am unsympathetic, but I am not able to help you.

his letter was cold and unsympathetic

I’m not sorry it happened this way.’ ” There were narrative benefits to Dykstra’s unapologetic bluntness, Hubbard felt, but he couldn’t help worrying about the long-term personal prognosis.

we are unapologetic about that