bitterly bitterly /ˈbɪtɝli/

adverb

1. () With bitterness; in a resentful manner  ( bitterly )
   with bitterness; in a resentful manner
    She complained bitterly
   she complained bitterly
   
2. () Indicating something hard to accept  ( bitterly )
   indicating something hard to accept
    He was bitterly disappointed
   he was bitterly disappointed
   
3. Extremely and sharply  ( bitingly , bitter , bitterly , piercingly )
   extremely and sharply
    It was bitterly cold
   it was bitterly cold
    Bitter cold
   bitter cold