inhuman

Lacking kindness, pity, or compassion; cruel or indifferent.

Not suited for human needs.

Not of ordinary human nature, form, or character.

Not human; not governed by feelings proper to human nature; specifically, not humane; hard-hearted; unfeeling; cruel.

Not proper to human nature; destitute of human quality; specifically, showing want of humanity; marked by unfeelingness or cruelty.