This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Lacking kindness, pity, or compassion; cruel. See Synonyms at cruel.

adj. Deficient in emotional warmth; cold.

adj. Not suited for human needs: an inhuman environment.

adj. Not of ordinary human form; monstrous.

adj. Of or pertaining to inhumanity and the indifferently cruel, sadistic or barbaric behavior it brings.

adj. Destitute of the kindness and tenderness that belong to a human being; cruel; barbarous; savage; unfeeling.

adj. Characterized by, or attended with, cruelty.

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.

Synonyms Pitiless, merciless, brutal, ruthless, remorseless.

adj. without compunction or human feeling

adj. belonging to or resembling something nonhuman

"Corporation ceased to enforce what he called inhuman discrimination."

inhumane    nonhuman   

humane   

brutal    merciless    pitiless    ruthless    ferocious    savage    fiendish    barbarous    unfeeling    cruel   

Neumann    Newman    Schuman    Schumann    Truman    acumen    albumin    bitumen    crewman    cumin   

cruel    unnatural    barbarous    ruthless    merciless    ferocious    heartless    unjust    terrify    hateful