unflagging /ʌnˈflæɡɪŋ/

• 1. 

  ADJ If you describe something such as support, effort, or enthusiasm as unflagging, you mean that it does not stop or get less as time passes. (支持、努力或热情)不减的 [表赞许]

  例：

  He was sustained by the unflagging support of his family.

  他有着来自家庭的持久的支持。