- (degree) To an extent not to be believed.
"His face turned unbelievably blue. We realized he was actually choking."
- (manner) In a manner that one does not believe.
"He gestured unbelievably. Everyone knew he was faking being sick."
- (evaluative) Contrary to expectations, amazingly.
"Unbelievably, Rudy saved the man's life but got sued for breaking two of his ribs."