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English definition of “perturbation”

perturbation

noun [U] (WORRY)    /ˌpɜː.təˈbeɪ.ʃən/ US  /ˌpɝː.t̬ɚ-/ formal
worryAnxiety and worry - general wordsFear and phobias
(Definition of perturbation noun (WORRY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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