Definition of unflagging adjective from the Oxford Advanced American Dictionary

     

    unflagging

     adjective
    adjective
    NAmE//ʌnˈflæɡɪŋ//
     
    [usually before noun]
     
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  1. 1remaining strong; not becoming weak or tired synonym tireless
  2. 2 unflagging energy She had shown unflagging support for the cause.
See the Oxford Advanced Learner's Dictionary entry: unflagging