1The two countries have been enemies for many years and have fought several wars.
2She considers her rival to be her enemy and tries to avoid her at all costs.
3The police are searching for the enemy of the state who committed the crime and are offering a reward for information.
4In the game, you have to defeat your enemy by solving puzzles and collecting points.
5The company's biggest enemy is the economic crisis, which has affected their sales and profits.