Jejune
Definition 1 of 3

Overly Simple
Use 'jejune' to imply something is too basic or lacks depth, often in intellectual contexts.

The plot of that movie was disappointingly jejune.
Negatively Boring
'Jejune' often carries a negative connotation, suggesting dullness and unoriginality.

The lecture was jejune— I learned nothing new.
Avoid Overuse
Don't overuse 'jejune'; it could make your own language seem unvaried.

Using 'jejune' repeatedly made his critique seem jejune itself.
Compare with
banalchildishimmatureinfantileinsipidnaiveteoriginaltrite
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