**Here are some examples of using the word «frivolous» in English:**
1. She spent all her money on frivolous purchases, such as expensive clothes and jewelry, without considering her financial situation.
2. He filed a frivolous lawsuit against a well-known company, hoping to gain publicity, but it was quickly dismissed by the court.
3. The teacher was disappointed in the students' lack of seriousness and warned them against frivolous behavior in class.
4. She decided to take a vacation to a beach resort, but ended up spending most of her time on frivolous activities like shopping and going to parties.
5. The company's decision to spend money on frivolous advertising campaigns instead of improving the product quality led to a decrease in sales.
6. He was accused of being frivolous and not taking his responsibilities seriously, but he insisted that he was just trying to have some fun.
7. The judge criticized the lawyer for filing a frivolous claim that had no basis in law.
8. She was tired of her friend's frivolous attitude and decided to distance herself from her.
9. The company's CEO was criticized for spending money on frivolous projects that did not contribute to the company's growth.
10. He was disappointed in his friend's frivolous approach to life and decided to change his own attitude towards it.