What is the verb form of nation?

There isn't a verb form of "nation" in the English language. "Nation" is a noun, meaning a large group of people united by common descent, history, culture, or language, inhabiting a particular country or territory.

If you're looking for a verb related to the idea of a nation, you might consider:

* Nationalize: To make something belong to or controlled by a nation.

* Nationalize: To make something become a citizen of a nation.

* Nation-build: To establish or create a nation.

Let me know if you had a specific context in mind, and I might be able to help you find a more appropriate word.