Is silly an adverb or adjective?

"Silly" is primarily an adjective. It describes a noun, meaning foolish or lacking sense.

For example:

* Silly jokes (adjective describing "jokes")

* He did a silly thing (adjective describing "thing")

However, "silly" can sometimes function as an adverb in informal speech, meaning "in a silly way" or "foolishly."

For example:

* He acted silly (adverb modifying the verb "acted")

* She laughed silly (adverb modifying the verb "laughed")

It's important to note that using "silly" as an adverb is less common and considered more casual. In formal writing, it's generally better to use a more formal adverb like "foolishly" or "absurdly."