What part of speech is cook?

"Cook" can be a few different parts of speech depending on how it's used:

* Verb: This is the most common usage. Example: "I cook dinner every night."

* Noun: This refers to a person who cooks professionally. Example: "My grandmother is a great cook."

Let me know if you have another example sentence in mind, and I can tell you what part of speech "cook" is in that specific context!