1. Failing to inform or clarify
   "an unenlightening comment"
   - unilluminating 
2. Not edifying
   - unedifying

Antonym: enlightening

• baddy
• Bade
• badge
• badger
• badger dog
• badger skunk
• Badger State
• badgerer
• badgering
• badinage
• badlands
• Badlands National Park
• badly
• badly-off
• badminton
• badminton court
• badminton equipment
• badminton racket
• badminton racquet
• badmouth
• badness
• Baeda
• baedeker
• Baffin Bay
• Baffin Island