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Synonyms

unintelligible

American  
[uhn-in-tel-i-juh-buhl] / ˌʌn ɪnˈtɛl ɪ dʒə bəl /

adjective

  1. not intelligible; not capable of being understood.

    Synonyms:
    undecipherable, baffling, incomprehensible

unintelligible British  
/ ˌʌnɪnˈtɛlɪdʒɪbəl /

adjective

  1. not able to be understood; incomprehensible

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of unintelligible

First recorded in 1610–20; un- 1 + intelligible

Explanation

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).

Keep Reading on Vocabulary.com

Vocabulary lists containing unintelligible

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

But overall, the music was at odds with the unintelligible staging.

From The Wall Street Journal Jul. 8, 2026

It’s a strange occurrence, but no stranger than her suddenly speaking an unintelligible language during the morning broadcast, just before collapsing.

From Salon Jun. 13, 2026

Like Bad Bunny, I have also heard people say that my Puerto Rican Spanish is unintelligible.

From BBC Feb. 10, 2026

As last year’s wildfires multiplied, still 0% contained, field reporters — tasked with articulating the unintelligible on camera — grieved alongside Los Angeles in real time.

From Los Angeles Times Jan. 5, 2026

With bated breath, I tried to gasp out what I had seen, but only managed to utter unintelligible, guttural sounds.

From "Kaffir Boy: An Autobiography" by Mark Mathabane

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