is i a verb or noun?

The word, "I," is a pronoun.

To determine if "i" is a verb or a noun, we need to understand its context.

"I" can be both a pronoun and a noun. As a pronoun, it is the first person singular pronoun, referring to oneself. For example, "I am going to the store."

As a noun, "I" can refer to the imaginary number in mathematics. In this sense, it represents the square root of -1. For instance, in the equation "2i + 3 = 0," "i" is used as a noun.

In general, it's important to consider the context in which "i" appears in order to determine whether it is functioning as a pronoun or a noun.