inhumane
in-hu-mane
adjective
Lacking compassion or kindness; extremely cruel or brutal towards people or animals.
"The inhumane treatment of prisoners shocked everyone."
Thesaurus
Synonyms: cold-blooded, cannibalic, inhuman, pitiless, brute, vicious, brutal, cold, brutish, fell, insensate, bestial
Antonyms: humane