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
Both fruits still provide a mix of soluble and insoluble fiber that supports gut and heart health.
—
Jillian Kubala, Health, 26 Feb. 2026
An episodic framework, physical comedy, a small ensemble of actors who are all at home in their clowns and who will all, at some point, drop the mask to speak to us as themselves — for Ogawa, these are ways to bring effervescence and intimacy to the contemplation of insoluble, heavy things.
—Sara Holdren, Vulture, 26 Feb. 2026
Constipation and Digestion Issues There are two types of fiber, soluble and insoluble, and both play important roles in regular bowel movements, says Laurie Allen, RDN, LDN, professor of nutrition and director of didactic program in dietetics nutrition at UNC Greensboro.
—Kirsten Nunez, Martha Stewart, 25 Feb. 2026
Is psyllium soluble or insoluble fiber?
—Carolyn L. Todd, SELF, 23 Feb. 2026
See All Example Sentences for insoluble
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Jillian Kubala, Health, 26 Feb. 2026
An episodic framework, physical comedy, a small ensemble of actors who are all at home in their clowns and who will all, at some point, drop the mask to speak to us as themselves — for Ogawa, these are ways to bring effervescence and intimacy to the contemplation of insoluble, heavy things.
—Sara Holdren, Vulture, 26 Feb. 2026
Constipation and Digestion Issues There are two types of fiber, soluble and insoluble, and both play important roles in regular bowel movements, says Laurie Allen, RDN, LDN, professor of nutrition and director of didactic program in dietetics nutrition at UNC Greensboro.
—Kirsten Nunez, Martha Stewart, 25 Feb. 2026
Is psyllium soluble or insoluble fiber?
—Carolyn L. Todd, SELF, 23 Feb. 2026
See All Example Sentences for insoluble
Cite this Entry
“Insoluble.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/insoluble. Accessed 7 Mar. 2026.
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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