* Simple and direct: The two families had a long-standing enmity that went back generations.
* With context: The political enmity between the two countries made any kind of collaboration impossible.
* Figurative: The writer's sharp criticism of the politician fueled an enmity between them that would never be forgotten.
* Using synonyms: The animosity between the two teams was palpable during the game, leading to several penalties.
The best way to use "enmity" in a sentence depends on the context and the desired tone. It's a strong word that implies a deep-seated hatred or hostility.