Is madly a verb or adverb?

First, I will explain verbs. A verb is most simply described as an action Word. Think, feel, swim, are all examples of verbs.

An adverb, however, is a descriptive Word that applies to a verb or adjective. When applying to a verb, it can say how, when and where something happened. Many adverbs end in LY. Madly is an adverb.