inhumane
adj.extremely cruel or causing a lot of suffering. It describes treatment that is so bad it does not seem like it belongs to a kind human world.
adj.lacking humanity, kindness, or compassion; causing unnecessary suffering. Often used to describe conditions or treatment that violate basic human rights.
“The prisoners were kept in inhumane conditions.”
“International observers condemned the inhumane treatment of refugees at the border camps.”
“The report highlighted the inhumane practices within the factory, where employees were forced to work eighteen-hour shifts without adequate breaks or ventilation.”
Often used predicatively after 'be' or 'seem', or attributively before nouns like 'conditions', 'treatment', or 'punishment'.
While 'un-' is a common prefix for adjectives, 'inhumane' uses the Latin-derived 'in-' prefix.
Originally a variant spelling and pronunciation of inhuman, ultimately from Latin inhūmānus; it appears to have died out 17c. but returned c. 1822, probably a reformation as a negative of humane from in- + humane.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.