**Here are 10 examples of using the word «countless» in English:**
1. There are countless reasons why exercise is beneficial for our health.
2. The city's art scene is renowned for its countless galleries and exhibitions.
3. She has visited countless countries during her travels.
4. The company has countless opportunities for career growth and development.
5. The internet offers countless resources for learning a new language.
6. The park is home to countless species of birds and wildlife.
7. He has read countless books on history and now knows countless facts.
8. The museum's collection includes countless artifacts from different civilizations.
9. The restaurant offers countless options for food and drink.
10. The team has faced countless challenges during its journey to success.
This word is often used to emphasize a large number or variety of something.