What part of speech is the word say?

The word "say" can be multiple parts of speech depending on how it is used in a sentence:

* Verb: This is the most common usage. It means to speak or express something.

* Example: "He said hello to me."

* Noun: This is less common, but it can refer to something that is said or a particular way of saying something.

* Example: "His say in the matter was ignored."

* Interjection: This is also less common. It can be used to express surprise or agreement.

* Example: "Say, that's a beautiful dress!"

So, the answer to your question depends on the context. Without a sentence, it's most likely a verb.