* Despite facing numerous setbacks, the scientist remained indefatigable in her pursuit of a cure for the disease. (Emphasis on perseverance)
* The indefatigable hiker trekked through the mountains for days, refusing to give up until he reached the summit. (Emphasis on tireless effort)
* Her indefatigable spirit and unwavering optimism inspired her team to overcome any obstacle. (Emphasis on a positive, unyielding nature)
* The indefatigable efforts of the firefighters saved countless lives during the raging wildfire. (Emphasis on tireless work in a challenging situation)
* Even after hours of work, the indefatigable artist continued to refine her masterpiece. (Emphasis on a dedication to perfection)