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
These small, furry fruits contain both soluble and insoluble fiber, which help draw water into the bowel (easing digestion and elimination) and add bulk for movement.
—
Morgan Fargo, Vogue, 20 May 2026
Some foods - like whole grains, kale, nuts and seeds - are good sources of insoluble fiber, which helps keep digestion moving.
—Maria Godoy, NPR, 18 May 2026
Indeed, the only shooting victims shown (in several devastating flashes) are the heart of the film’s insoluble sorrows.
—Sophie Monks Kaufman, IndieWire, 16 May 2026
Key sources of fiber, both soluble and insoluble, include seeds, beans, lentils, whole grains and vegetables.
—Kaitlin Sullivan, NBC news, 29 Apr. 2026
See All Example Sentences for insoluble
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Morgan Fargo, Vogue, 20 May 2026
Some foods - like whole grains, kale, nuts and seeds - are good sources of insoluble fiber, which helps keep digestion moving.
—Maria Godoy, NPR, 18 May 2026
Indeed, the only shooting victims shown (in several devastating flashes) are the heart of the film’s insoluble sorrows.
—Sophie Monks Kaufman, IndieWire, 16 May 2026
Key sources of fiber, both soluble and insoluble, include seeds, beans, lentils, whole grains and vegetables.
—Kaitlin Sullivan, NBC news, 29 Apr. 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 22 May. 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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