To make a verb related to agony, you could use these options:
Using existing verbs:
* Agonize: This verb means to suffer intense mental anguish or distress.
* Torture: This verb can describe the act of causing someone agony.
* Rack: This verb can mean to inflict severe pain or torment, causing someone agony.
* Plague: This verb can describe something that causes continual suffering or agony.
Creating new verbs (less common):
* Agonify: This is a less common but possible verb meaning "to cause agony".
* Agonize (someone): This is a less formal way to say "to torture" or "to cause agony."
Remember, the best verb choice depends on the context and the specific meaning you want to convey.