bestialize in British English. or bestialise (ˈbɛstɪəˌlaɪz ) verb. (transitive) to make bestial or brutal. Collins Dictionary
Describing how certain conditions, like war, can "bestialize" participants by stripping away their humanity.
The word carries a heavy, negative connotation and is typically used to describe serious moral or physical degradation. bestialize
BESTIALITY definition in American English - Collins Dictionary
Brutalize, dehumanize, animalize, degrade, and deprave. Key Considerations bestialize in British English
It is a formal term. In everyday conversation, people are more likely to use "dehumanize" or "brutalize" to convey the same meaning.
BESTIALIZE definition in American English - Collins Dictionary bestialize
While related by root, "bestialize" is a verb describing a process of degradation, whereas "bestiality" refers to specific sexual acts between humans and animals.