/ ɪnˈhjuːmən; NAmE / adjective
1.
lacking the qualities of kindness and pity; very cruel :
inhuman and degrading treatment
2.
not human; not seeming to be produced by a human and therefore frightening :
There was a strange inhuman sound.
—compare human , non-human , subhuman
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WORD ORIGIN
late Middle English (originally as inhumane ): from Latin inhumanus , from in- not + humanus (from homo man, human being).