adjective🔗ShareNot able to be tired; inexhaustible."The marathon runner was tireless and untiring, completing the race despite the heat and long distance. "abilityenergycharacterphysiologyChat with AIVocabulary GamePractice Reading
adjective🔗ShareUnfailing; resolute."Despite the long hours, the student remained untiring in her efforts to pass the exam. "characterattitudeabilityChat with AIVocabulary GamePractice Reading
