/ ˈpeɪnfəli; NAmE / adverb
1.
extremely, and in a way that makes you feel annoyed, upset, etc. :
Their son was painfully shy .
The dog was painfully thin .
He was painfully aware of his lack of experience.
Progress has been painfully slow .
2.
in a way that causes you physical or emotional pain :
He banged his knee painfully against the desk.
3.
with a lot of effort and difficulty :
painfully acquired experience