unflagging enthusiasm不减退的热诚
Unflagging Courtesy不倦礼貌
unflagging efforts锲而不舍
unflagging g不减弱的;不屈不挠既
unfading unflagging不衰的
unflagging a不衰的
Unflagging to the end不懈地坚持到最后
with unflagging patience不厌其烦
ADJ（形容词） 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]
He was sustained by the unflagging support of his family.
他有着来自家庭的持久的支持。