**Here are 10 examples of using the word «foolish»:**
1. It was foolish of me to believe his promises without checking the facts first.
2. She realized her foolish mistake when she saw the damage caused by her carelessness.
3. He made a foolish decision to quit his job without having another one lined up.
4. It was a foolish idea to go hiking in the mountains without proper equipment and preparation.
5. The company's decision to ignore environmental concerns was foolish and resulted in public backlash.
6. She felt foolish for wearing such a revealing dress to a formal event.
7. He felt foolish for spending all his money on a useless gadget.
8. It was foolish to assume that the project would be easy and require little effort.
9. She regretted her foolish behavior and decided to change her ways.
10. He warned his friends about the foolishness of trusting strangers online.