pitiless

This term describes a cold, absolute absence of empathy that often borders on the cruel. It suggests a hardness of heart where the suffering of others is either ignored or viewed with indifference, frequently associated with figures of authority, nature, or fate. While similar to ruthless, pitiless emphasizes the lack of emotional response rather than just the drive for a goal.

In a descriptive sense, it can be applied to non-human entities, such as a pitiless sun or a pitiless wind, to convey an unrelenting and oppressive force that offers no respite. In these cases, the word shifts from a moral judgment of character to a description of an inevitable, harsh reality.