This may look like a verb at first, but it's actually the adverb version of the adjective 凄い. When something is awful it's usually awfully awful.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You've learned this reading already, so you should be able to read this on your own.
Vietnamese coffee was very sweet. I was surprised!
The teacher's health condition got awfully bad today, so class was canceled.
この長靴が凄く欲しいんだけど、Amazon Prime Nowでオーダーする価値あるかな？
I want these rain boots so bad. Do you think ordering them from Amazon Prime Now is worth it?