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unintelligible

Something unintelligible is difficult to understand, either because the room is too noisy or because the unintelligible thing is too quiet or confusing.

We use our intelligence to understand things, and something intelligible is easy to understand. Therefore, unintelligible things are hard to understand. A coded message is unintelligible if you don't know the code. A whisper in a loud room is unintelligible. A weird sentence like "The waffles ran away from the Easter basket" is unintelligible because it doesn't make any sense. If you can't hear or understand something, it's unintelligible (and probably frustrating too).

Definitions of unintelligible
  1. adjective
    not clearly understood or expressed
    synonyms: opaque
    incomprehensible, uncomprehensible
    difficult to understand
  2. adjective
    poorly articulated or enunciated, or drowned by noise
    unintelligible speech”
    Synonyms:
    incomprehensible, uncomprehensible
    difficult to understand
    slurred, thick
    spoken as if with a thick tongue
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    Antonyms:
    intelligible
    well articulated or enunciated, and loud enough to be heard distinctly
    comprehendible, comprehensible
    capable of being comprehended or understood
    show more antonyms...
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