Learner's definition of PAINFULLY
[more painfully; most painfully]
very or extremely
— used especially to describe something that is bad, unpleasant, or upsetting
They made it painfully obvious/clear that we were not welcome. [=they made it very clear in a way that was rude or upsetting that we were not welcome]
After the injury she was painfully aware that her career in tennis would be over.
New developments have been painfully slow.
She is painfully shy.
in a way that causes pain
in a way that requires a lot of effort