- cold, cold-blooded, inhuman, insensate - without compunction or human feeling; "in cold blood"; "cold-blooded killing"; "insensate destruction"
Antonym: humane (indirect, via inhumane)
- inhuman - belonging to or resembling something nonhuman; "something dark and inhuman in form"; "a babel of inhuman noises"
Antonym: human (indirect, via nonhuman)