1. in a way that shows great effort and energy without becoming tired or giving up

Examples

• She worked tirelessly to finish the project on time.
• The volunteers searched tirelessly for the missing hiker.
• He campaigned tirelessly for civil rights throughout his career.
• The scientist researched tirelessly to find a cure for the disease.
• The team practiced tirelessly before the championship game.
• She advocated tirelessly for better education funding.