What is the prefix for entreaty?

There isn't a specific prefix that directly translates to "entreaty." However, the word "entreaty" itself is derived from the verb "entreat," which can be broken down into its parts:

* en-: This prefix often indicates "in" or "into," but it's not the primary element defining "entreaty."

* treat: This is the root word, meaning "to handle" or "to deal with."

So, while there isn't a single prefix for "entreaty," the word's structure suggests a sense of "handling" or "dealing with" something with a specific purpose, usually to persuade or request.