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English definition of “unbelievably”

unbelievably

adverb     /ˌʌn.bɪˈliː.və.bli/
in a way that is very surprising or difficult to believe: He works unbelievably hard. It was still an unbelievably stupid thing to do.Not believable
(Definition of unbelievably adverb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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