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English definition of “fickle”

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fickle

adjective uk   /ˈfɪk.l̩/ us  
disapproving likely to change your opinion or your feelings suddenly and without a good reason: She's so fickle - she's never been interested in the same man for more than a week! The world of popular music is notoriously fickle. Fickle conditions are likely to change suddenly and without warning: Fickle winds made sailing conditions difficult.
fickleness
noun [U] uk   /-nəs/ us  
(Definition of fickle from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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