UNFLAGGING
Meaning of UNFLAGGING in English
/ ˌʌnˈflægɪŋ; NAmE / adjective
[ usually before noun ] remaining strong; not becoming weak or tired
SYN tireless :
unflagging energy
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005