unintelligible
Americanadjective
adjective
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).
Vocabulary lists containing unintelligible
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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.
On the rare occasions when he chimed in, it wasn’t to ask Claude about the unintelligible string of equations on his screen.
From The Wall Street Journal ● Aug. 15, 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
The fan shouts “Aaron Burr! Aaron Burr!” but his mouth is so stuck full of peanut butter that he’s unintelligible.
From Los Angeles Times ● Feb. 14, 2026
The practice could be seen everywhere on the daily commute, adorned on walls, tunnels and metal shutters - always unintelligible, loud and colourful.
From BBC ● Oct. 22, 2025
She breathed in damp, wheezing gasps and cursed periodically, reverting to her unintelligible native tongue.
From "Fablehaven" by Brandon Mull
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
