DictionaryjejuneNaive or immature
adjective

jejune

jih-JOON/dʒɪˈdʒuːn/

Insufficiently developed in thought or substance.

The student's jejune city model ignores how real neighborhoods work.

A shallow school project model of a complex city made of just a few crude blocks, teenage white presenter overly confident and thoughtful Black teacher unimpressed; simplistic content.
Etymology

Latin ieiunus meant “fasting, hungry” and also “empty, barren.” This physical emptiness became intellectual thinness: English first used jejune for what was dull or insipid, leading naturally to “lacking substance.”

More examples

  • Her jejune proposal overlooks the basic costs of running a business.
  • The essay offers jejune observations instead of careful analysis.
  • He dismisses their concerns with a jejune remark about staying positive.

Forms

jejune

Similar words

simplistic
Emphasizes reducing a complex matter to an inadequate explanation.
immature
Emphasizes undeveloped judgment or behavior rather than thin substance.
superficial
Emphasizes attention to surface details rather than deeper understanding.