jejune

/dʒɪˈdʒuːn/
adjective
  1. Too simple or childish; lacking substance or sophistication.
    • The movie's plot was jejune and predictable.
    • The essay was criticized for its jejune analysis of the topic.
    • His jejune remarks made the audience roll their eyes.
  2. Lacking interest or significance; dull or flat.
    • The party was a jejune affair with nothing exciting happening.
    • The lecture was so jejune that half the class fell asleep.
    • She found the conversation jejune and stopped listening.
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