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English definition of “prey on sb's mind”

prey on sb's mind

If a problem preys on your mind, you think about it and worry about it a lot: I lost my temper with her the other day and it's been preying on my mind ever since.Anxious and worriedContinually thinking about
(Definition of prey on sb's mind from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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