What part of speech is rocky?

"Rocky" can be a few different parts of speech, depending on how it's used in a sentence:

* Adjective: Describing something as being like rock - "The road was rocky."

* Noun: Referring to a rock formation - "They climbed the rocky peak."

* Proper Noun: Referring to the famous fictional boxer - "Rocky Balboa is a legend."

To determine the part of speech, you need to look at the context of the sentence.