Describing a person:
* The lion tamer faced the fierce lion with unwavering courage.
* She was a fierce advocate for social justice, fighting tirelessly for equality.
* Despite his gentle nature, he had a fierce determination to succeed.
Describing animals:
* The fierce tiger stalked its prey through the dense jungle.
* The fierce storm battered the coast with relentless waves.
* The fierce battle cry of the warrior sent shivers down the enemy's spine.
Describing an action or emotion:
* He felt a fierce anger rise within him as he witnessed the injustice.
* The fierce competition for the award was evident in the players' determined faces.
* The fierce sun beat down on the parched land.
Figurative language:
* He had a fierce love for his family, protecting them with all his might.
* Her fierce independence made it difficult for others to control her.
* The fierce beauty of the mountain range left her speechless.
The context of the sentence will determine the best way to use "fierce".