1She was an indefatigable campaigner for women's rights, dedicating her life to the cause.
2Is the team's indefatigable coach the reason behind their remarkable comeback this season?
3Despite the setbacks, the researchers remained indefatigable in their pursuit of a cure for the disease.
4Try to be more indefatigable in your approach to learning new languages, and you will see improvement over time.
5The company's indefatigable commitment to innovation has led to numerous breakthroughs in the field of renewable energy.