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mistaken

 
 
/mɪˈsteɪkən/ adjective

Definition

If you are mistaken, or you have a mistaken belief, you are wrong about something: If you think you can behave like that, you are mistaken.
mistakenly adverb I mistakenly (= wrongly) thought he had left.
(Definition of mistaken adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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