unflagging
🇺🇸
/ˌʌnˈflæɡɪŋ/
🇬🇧
/ˌʌnˈflæɡɪŋ/
constantly strong and energetic; never getting tired or weak
Her unflagging enthusiasm for the project was inspiring to everyone.
彼女のプロジェクトに対する絶え間ない熱意は皆を感動させた。