insoluble
adjective
in·sol·u·ble
(ˌ)in-ˈsäl-yə-bəl 
: not soluble: such as
a
: incapable of being dissolved in a liquid and especially water
also
: soluble only with difficulty or to a slight degree
b
: having or admitting of no solution or explanation
an insoluble problem
c
archaic
: indissoluble
insoluble
noun
Synonyms
Examples of insoluble in a Sentence
a substance insoluble in water
the seemingly insoluble mystery concerning the identity of the people who built these ancient structures
Recent Examples on the Web
Improve Digestive Health The insoluble fiber (the fiber that can't dissolve in water) in hazelnuts can help the intestines absorb water and increase the bulk of waste products, speeding their passage and expulsion.
—
Heather Jones, Verywell Health, 28 Jan. 2025
While high-fiber foods can help with regularity and constipation, insoluble fiber—found in the outer skin of plant foods such as whole grains, nuts, and seeds—may cause more bloating and gas.
—Johna Burdeos, Health, 21 Jan. 2025
Soluble fiber slows digestion to allow for better absorption of nutrients, while insoluble fiber adds bulk to the stool, which helps prevent constipation.
—Sarah Scott, Verywell Health, 22 Oct. 2024
Bacteria in the gut do not ferment (break down) insoluble fiber.1
Soluble fiber ferments in the gut, which releases helpful by-products such as short-chain fatty acids (SCFAs).1 SCFAs have health-promoting effects, including fighting inflammation and supporting the immune system.2
1.
—Johna Burdeos, Health, 4 Dec. 2024
See all Example Sentences for insoluble 
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Heather Jones, Verywell Health, 28 Jan. 2025
While high-fiber foods can help with regularity and constipation, insoluble fiber—found in the outer skin of plant foods such as whole grains, nuts, and seeds—may cause more bloating and gas.
—Johna Burdeos, Health, 21 Jan. 2025
Soluble fiber slows digestion to allow for better absorption of nutrients, while insoluble fiber adds bulk to the stool, which helps prevent constipation.
—Sarah Scott, Verywell Health, 22 Oct. 2024
Bacteria in the gut do not ferment (break down) insoluble fiber.1
Soluble fiber ferments in the gut, which releases helpful by-products such as short-chain fatty acids (SCFAs).1 SCFAs have health-promoting effects, including fighting inflammation and supporting the immune system.2
1.
—Johna Burdeos, Health, 4 Dec. 2024
See all Example Sentences for insoluble
Dictionary Entries Near insoluble
Cite this Entry
“Insoluble.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insoluble. Accessed 1 Feb. 2025.
Copy CitationKids Definition
insoluble
adjective
in·sol·u·ble
(ˈ)in-ˈsäl-yə-bəl
1
: impossible to solve
an insoluble problem
2
: impossible or difficult to dissolve
a substance insoluble in water
Medical Definition
insoluble
adjective
in·sol·u·ble
(ˈ)in-ˈsäl-yə-bəl
: incapable of being dissolved in a liquid
also
: soluble only with difficulty or to a slight degree
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