Definitions
hard or impossible to understand
Word origin
From un- + intelligible.
Used in a sentence
“The curious feature of the art was that "horse-whisperers" actually talked to the animal, usually from mouth to ear, in an unintelligible tongue; which, however, the horses appeared to understand.”
“Unintelligible announcements on station loudspeakers are both irritating and confusing.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Clear as mud”14 letters
Not quite right?
"Search similar patterns."
U_____________