dehumanize
🇺🇸
/ˌdiːˈhjuːmənaɪz/
🇬🇧
/ˌdiːˈhjuːmənaɪz/
To treat someone like they are not a person, by ignoring their feelings or treating them as an object.
The way prisoners were treated in the camp dehumanized them, making them feel like they were less than human.