Simple Sentences:
* Her tenacity allowed her to finish the marathon even though she was injured.
* The lawyer's tenacity in the courtroom was impressive.
* Tenacity is key to achieving any goal.
More Complex Sentences:
* Despite facing numerous setbacks, the entrepreneur's tenacity and unwavering belief in his product ultimately led to success.
* The artist's tenacity in pursuing her craft, even during periods of doubt and rejection, was truly inspiring.
* The team's tenacity on the field was evident in their refusal to give up, even when they were trailing by a large margin.
Figurative Language:
* He approached the challenge with the tenacity of a bulldog, refusing to give up until he had achieved his objective.
* Her tenacity was like a steel trap, holding onto her dream no matter what obstacles arose.
Remember that "tenacity" is a noun, so it can be used as the subject of a sentence, the object of a verb, or the object of a preposition.