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English definition of “unflagging”

unflagging

adjective     /ʌnˈflæɡ.ɪŋ/
If a quality, such as energy, interest, or enthusiasm, is unflagging, it never becomes weaker: He thanked Tony for his unflagging energy and support.Having a powerful effectStrong feelingsVery and extreme
(Definition of unflagging adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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