Answer:
It is an antonym.
Explanation:
Antonyms are words that have opposite meanings.
The meaning of the word petulant is insolent or rude in speech or behavior, while the word agreeable means pleasant or willing to agree to something. As we can see, those two meanings are very different.
An analogy is a comparison between two things, typically used to explain or clarify something.
Cognates are words that have a common origin.
Synonyms are different words that mean the same thing.
