* Noun: This is the most common usage, referring to the practice or art of conducting negotiations between nations or other groups.
* Example: "The ambassador excelled in the art of diplomacy."
* Adjective: Describing something related to diplomacy.
* Example: "They had a diplomatic meeting to resolve the conflict."
* Verb: While less common, it can mean to engage in diplomacy.
* Example: "The two countries diplomatized to reach a peace agreement."
Therefore, the specific part of speech for "diplomacy" depends on its context within the sentence.