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English definition of “headache”

headache

noun [C] (DIFFICULTY)    /ˈhed.eɪk/
something that causes you great difficulty and worry: Finding a babysitter for Saturday evening will be a major headache.Difficult things and peoplePreventing and impeding
(Definition of headache noun (DIFFICULTY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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