It's an adjective.
Idiom
The phrase "check" can be a verb, noun, or interjection, depending on the context in which it is used.
The phrase "when pigs fly" is an example of an idiom. It is used figuratively to convey that something is unlikely or impossible to happen.
Above the law is a phrase used that you are not suppose to be take literally. It is an idiom.
Regular BERRIES. (Oran Berries in HeartGold).
The underlined phrase "to tolerate opposing views" is an infinitive phrase. It functions as the complement of the verb "means" in the sentence.
berries & insects
arctic berries tehe
The phrase "on the fence" is an example of an idiom, specifically one that is used to describe someone who is undecided or uncommitted about a particular issue or decision.
A fruit coulis is often made from fresh or frozen berries. Its simply as pureed fruit thinned to the desired consistency with sugar syrup.
"Central" functions as an adjective, describing the type of idea. "Idea" is a noun, which is the main subject of the phrase. Together, "central idea" forms a noun phrase.
"Ahem" is classified as an interjection, which is a type of word or phrase used to express a sudden or strong emotion or sentiment. It is commonly used to gain attention or to indicate a pause in speech.