" Nouns can act like adjectives (“chocolate cake”); adjectives can act like nouns (“grammarians are the damned”); verbs can look like verbs (“she’s running down the street”) or adjectives (“a running engine”) or nouns (“her favorite hobby is running”). Adverbs look like everything else; they are the junk drawer of the English language (“like so”). "

― Kory Stamper , Word by Word: The Secret Life of Dictionaries