What is the verb form of atrocious?

There isn't a direct verb form of "atrocious." It's an adjective meaning extremely bad or unpleasant.

To express the idea of something being atrocious as an action, you would need to use a verb that conveys the idea of making something bad or unpleasant.

For example, you could use:

* To make something atrocious: "The director made the movie atrocious."

* To do something atrocious: "The war criminal did atrocious things."

* To treat someone atrociously: "The prisoners were treated atrociously."

Let me know if you'd like me to help you find a more specific verb for your particular context!