Definition:
The word "plenty" can be used both as a noun and as an adverb.
In more formal contexts, instead of saying "plenty," you might use "ample" or "sufficient." For example, "There is ample evidence" instead of "There is plenty of evidence."
While "plenty" generally means a large amount, in informal contexts, it can also suggest a feeling of satisfaction. For example, "That was plenty fun!" implies that the fun was enough or more than expected.
Although "plenty" does not typically belong to phrasal verbs, you can use it in phrases like: - "Have plenty to say": Meaning to have a lot of opinions or thoughts on a topic.