unflagging
🇺🇸
/ˌʌnˈflæɡɪŋ/
🇬🇧
/ˌʌnˈflæɡɪŋ/
constantly strong and energetic; never getting tired or weak
Her unflagging enthusiasm for the project was inspiring to everyone.
她对项目的无限热情激励着每个人。