What part of speech is negotiate?

"Negotiate" can be either a verb or a noun, depending on how it's used in a sentence:

Verb: When "negotiate" is used to describe the action of discussing terms to reach an agreement, it's a verb.

* Example: "The two parties negotiated a peace treaty."

Noun: When "negotiate" refers to the process of discussing terms to reach an agreement, it's a noun.

* Example: "The negotiate was long and difficult, but ultimately successful."

So, to determine the part of speech, look at how it's used in the sentence!