inhumanin‧hu‧man /ɪnˈhjuːmən/ adjective 
cruel behaviour/punishments/treatment► cruel intended to upset someone or make them suffer: · Lyle was always playing cruel jokes on his little sister.· The electric chair is possibly the cruellest method of execution.it is cruel to do something: · I think it's cruel to keep dogs locked up inside all day.
► barbaric extremely cruel, in a way that shocks people: · We consider the death penalty to be barbaric.· the barbaric treatment of civilians in the concentration camps
► inhuman very cruel and not showing any of the pity or concern that normal people feel when they see other people suffering: · The prison conditions in this country are inhuman.· The government has been accused of using artificial and inhuman criteria to decide which refugees should be deported.
► inhumane: inhumane treatment/conditions/methods etc actions or conditions that are not considered acceptable because they cause too much suffering: · Amnesty International is protesting against the inhumane treatment of these political prisoners.· This method of slaughtering chickens is now regarded by many as inhumane.
► cold-blooded: cold-blooded murder/killing/attack a murder etc done without showing any feeling or pity for the person who is attacked: · The entire nation has been shocked by the cold-blooded murder of the two girls.
► in cold blood if you kill someone in cold blood , you kill them in a cruel and deliberate way without showing any emotion: · The killers hunted Pedro down like an animal and murdered him in cold blood.
nounhumanhumanismhumanity ≠ inhumanityhumanitarianhumanitarianismhumankindhumanoidadjectivehuman ≠ inhumansuperhumansubhumanhumane ≠ inhumanehumanitarianhumanoidadverbhumanly ≠ inhumanlyhumanely ≠ inhumanelyverbhumanize
The refugees had suffered degrading and inhuman treatment.2lacking any human qualities in a way that seems strange or frightening: