When you're laying it on thick, utterly is an utterly useful word: it means something similar to completely, totally, or very. Something utterly disappointing is extremely disappointing. Something utterly wonderful is wonderful times ten. When you get tired of writing very, utterly is a good word choice.
When can you use utterly?
You use utterly to emphasize that something is very great in extent, degree, or amount. Everything about the country seemed utterly different from what I'd experienced before. The new laws coming in are utterly ridiculous.
What does utterly mean mean?
: to an absolute or extreme degree : to the full extent : in an utter manner : absolutely, entirely, totally Just when you're expecting to hear something trite or ordinary, Rich invents a tasty, utterly charming piece of ear candy.—