bitterly
//ˈbɪtəli//
Adverb
bitterlyCanonical form
1
In a way that shows strong negative emotions such as anger, disappointment, or resentment.
She cried bitterly when she heard the news.
2
In an extremely cold or harsh manner.
It was bitterly cold outside last night.
3
In a way that causes great distress or suffering.
She bitterly regretted her decision to leave.