**Foe** — a person who you dislike and who you think is unfriendly or hostile towards you.
Here are some examples of using the word «foe» in English:
1. The two countries were once close allies, but now they are bitter foes.
2. She faced many challenges in her life, but she never gave up, even when her foes tried to discourage her.
3. He was a great leader who always stood up to his foes and never backed down.
4. The team was determined to defeat their foes and win the championship.
5. She was afraid of her foes' plans and knew she had to act quickly to protect herself.
6. The negotiations between the two parties were tense, with each side seeing the other as a potential foe.
7. He had to fight his inner foes, his doubts and fears, to achieve his goals.
8. The company was facing a new foe in the form of a powerful competitor.
9. She knew that her foes were watching her every move, so she had to be careful.
10. The hero had to defeat his greatest foe to save the world.