unbelievably

adverb

1. mannerIn a manner that one does not or cannot believe.

   “He gestured unbelievably. Everyone knew he was faking his illness.”

2. degreeTo an extent not to be believed.

   “His face turned unbelievably blue. We realized he was actually choking.”

3. evaluativeContrary to expectations, amazingly.

   “Unbelievably, Rudy saved the man's life but got sued for breaking two of his ribs.”