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
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
Soluble fiber, like the kind found in fruit and vegetables, dissolves in water to form a gel, while insoluble fiber—which comes from sources like grains—doesn’t dissolve.
—
Perri Ormont Blumberg, Time, 5 June 2025
Other fiber types, including insoluble fiber like wheat bran, do not provide these health benefits.1 Consider these benefits when choosing the right fiber supplement to meet your overall health needs.
—T'keyah Bazin, Verywell Health, 4 June 2025
Good sources of insoluble fiber include raspberries, pears, apricots, figs, and prunes, which are known for promoting regularity.14
4.
—Lauren O'Connor, Health, 3 June 2025
Supports Digestion Okra contains soluble and insoluble fiber that supports digestive health.
—Cristina Mutchler, Verywell Health, 21 May 2025
See All Example Sentences for insoluble
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Perri Ormont Blumberg, Time, 5 June 2025
Other fiber types, including insoluble fiber like wheat bran, do not provide these health benefits.1 Consider these benefits when choosing the right fiber supplement to meet your overall health needs.
—T'keyah Bazin, Verywell Health, 4 June 2025
Good sources of insoluble fiber include raspberries, pears, apricots, figs, and prunes, which are known for promoting regularity.14
4.
—Lauren O'Connor, Health, 3 June 2025
Supports Digestion Okra contains soluble and insoluble fiber that supports digestive health.
—Cristina Mutchler, Verywell Health, 21 May 2025
See All Example Sentences for insoluble
Cite this Entry
“Insoluble.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insoluble. Accessed 13 Jun. 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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