unintelligible
1. [ adjective ] poorly articulated or enunciated, or drowned by noise
Examples:

"unintelligible speech"

Related terms: intelligible slurred incomprehensible
2. [ adjective ] not clearly understood or expressed
Synonyms: opaque
Related terms: incomprehensible
Similar spelling:   unintelligibly
  unintelligent
  unintelligibility
  unintelligently
  unintegrated