1. not tired or fatigued; having energy and strength
Usage: formal; literary
2. persistent and determined; not giving up despite difficulties
Usage: formal; literary

Examples

• The unwearied hikers continued up the mountain trail.
• She remained unwearied in her pursuit of justice.
• His unwearied efforts finally paid off with success.
• The unwearied volunteers worked through the night.
• Despite the setbacks, he was unwearied in his determination.
• The unwearied researcher spent years studying the problem.