ex. "she was living in denial after her father died."

dehumanization: stripping someone of their rights through torture and bullying, or producing propaganda to make a group of people believe another group is subhuman.

"Nazis worked to dehumanize Jews, in order to assure the German populace would turn their heads to their mistreatment."

Persecution: To go after and treat poorly a certain group, whether it be for their ethnicity, religion, beliefs or anything else identity related.

Extermination: To completely remove a group of living beings.

"Exterminators got rid of the ants in our building."