Is this your crossword clue?
"bitter" is also used as a crossword clue. If that's what you saw, the answer is often resentful (9 letters).
Definitions
Angry, resentful, or harsh in feeling or taste.
Word origin
From Middle English bitter, bittre, from Old English bitter, biter (“bitter”), from Proto-West Germanic *bitr, from Proto-Germanic *bitraz (“bitter”), equivalent to bite + -er (agent noun suffix) used attributively. Cognate with Saterland Frisian, West Frisian, Low German, Danish, Dutch, German, Norwegian Bokmål, Norwegian Nynorsk, and Swedish bitter, Icelandic bitur (all meaning “bitter”).
Used in a sentence
“The coffee tasted bitter.”
“It was at the end of February, […] when the world was cold, and a bitter wind howled down the moors […].”
“They're bitter enemies.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Sharp in taste”6 letters
02“Sharp-tasting or resentful”6 letters
Not quite right?
"Search similar patterns."
B_____