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jejune

adjective
 
 
/dʒɪˈdʒuːn/ formal disapproving

Definition

very simple or childish: He made jejune generalizations about how all students were lazy and never did any work.Naive and trustingInexperienced (of people)
(Definition of jejune adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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