indefatigableness
/ˌɪndɪˈfætɪɡəbəlnəs/
noun
- The state or quality of being indefatigable; tirelessness.
- The charity's success was due to the indefatigableness of its volunteers.
- She showed remarkable indefatigableness while studying for her exams.
- His indefatigableness amazed everyone on the long hike.
Antonyms