Leave a sour taste in one’s mouth = to leave a bad feeling or memory with someone.( a negative impression).
- The way they conducted the interview left a sour taste in my mouth. I don’t think I’d accept the job even if they offered it.
- I know Jim is your friend, but he was so rude at dinner; it just left a sour taste in my mouth.
- The way the waitress treated us left a sour taste in my mouth and I never went back.
To the bitter end = to the final, most critical extremity such as death or total defeat.
- My father stayed beside my dying mother’s bed to the bitter end.
- The worker would fight to the bitter end.
Bear fruit = yield positive results.
- Eventually her efforts bore fruit and she got the job she wanted.
- Our apple tree didn’t bear fruit this year.
- Don is convinced that this plan will bear fruit if we just keep working on it.