a bitter taste
And due to these bizarre situations I went through as a little boy, everything related to shopping seems like a bitter liquid which I'm forced to drink. (First Certificate in English; B2; Portuguese)
I feel very bitter about my childhood and the way I was treated.
She'd suffered terribly over the years but it hadn't made her bitter.
What can be more real than when your lover is gone or taken away your own soul is also alone, bitter and dark and there is nothing else than feelings of rev[e]nge, anger, frustration and sadness? (First Certificate in English; B2; Spanish)
a bitter argument/dispute
Every time they met, a bitter feeling of hatre[d] bloomed in her throat. (First Certificate in English; B2; Spanish)
Failing the final exam was a bitter disappointment for me.
She learned through bitter experience that he was not to be trusted.
Now, I've already recovered from this bitter experience. (First Certificate in English; B2; Japanese)
a bitter wind
The president fought for his plan to the bitter end.
We are willing to talk and find alternatives to the situation, but we are also ready to fight till the bitter end to stand for our rights. (Certificate of Proficiency in English; C2; Portuguese)