noun, plural in·hu·man·i·ties for 2. the state or quality of being inhuman or inhumane; cruelty. an inhuman or inhumane act.

Is there such a word as inhuman?

lacking qualities of sympathy, pity, warmth, compassion, or the like; cruel; brutal: an inhuman master.

Which is correct unhuman or inhuman?

As adjectives the difference between inhuman and unhuman

is that inhuman is of or pertaining to inhumanity and the indifferently cruel, sadistic or barbaric behavior it brings while unhuman is not resembling or having the qualities of a human being.