Why Is Immensely an Adverb?

Immensely is an adverb that means vastly, or very, or hugely. An immensely good time is a really, really good time. If you know that immense means huge, then you probably already have a sense of what immensely means. It's a word for describing the enormous degree of something.

Is immense a adverb?

Hugely; extremely; vastly.

Is immensely a adjective?

very much; extremely: Guiding students to excel in their studies has been immensely satisfying.