What is the verb form of peristalsis?

Answer 1

There really isn't a verb form of 'peristalsis', because peristalsis is a noun that is actually acting like a verb. Since peristalsis is the muscular action of bringing food down the esophagus, it is sort of a noun/verb combo. There isn't a verb form since peristalsis is a noun that has a verb definition.

Answer 2

While it's true English lacks a native verb form of this Greek noun, its etymology traces back to the Greek verb περιστέλλω ("peristéllō" in the first-person singular conjugation), which had several clothing-related meanings, including to clothe something/someone or to cloak/cover something or someone.

From this, the Greek adjective περισταλτικός ("peristaltikós") evolved, meaning tight or compressing in reference to clothes, or in general. The ancient Greeks seemingly understood the digestive phenomenon of peristalsis and naturally used this adjective to describe it. This is the etymology of the English noun "peristalsis."

So while there is no verb form in English, who's to say you're not free to create one? Shakespeare often fabricated nouns from verbs, vice-versa, and the like. Personally, I recommend "peristal" ("With white knuckles, the neurotic man peristalled every bit of ketchup from the packet rather than just getting a second.")