unenlightening
1. [ adjective ] not edifying
Synonyms: unedifying
Related terms: edifying
2. [ adjective ] not tending to inform or clarify
Synonyms: uninstructive uninformative
Examples:

"an unenlightening comment"

Related terms: enlightening
3. [ adjective ] failing to enlighten or clarify
Synonyms: unilluminating
Examples:

"an unilluminating report"

Related terms: illuminating
Similar spelling:   unenlightened
  unenlightenment