3 words match “insipid”

• insipid adjective

  lacking flavor, interest or liveliness

  The soup was insipid until we added salt and chilies.

  Like bland, tasteless, dull

• jejune adjective

  naive and simplistic; dull and lacking interest

  The judges found the essay’s arguments jejune and unconvincing.

  Like naive, simplistic, insipid

• vapid adjective

  dull and lacking interest or ideas

  The film had beautiful scenery but a vapid story.

  Like insipid, bland, dull