as in impossible
incapable of being solved or accomplished
the seemingly insoluble mystery concerning the identity of the people who built these ancient structures
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Recent Examples of insoluble
The flesh of the apple has soluble fiber, while the skin has insoluble fiber.
—
Mara Santilli, SELF, 27 June 2025
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
See All Example Sentences for insoluble
Mara Santilli, SELF, 27 June 2025
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
See All Example Sentences for insoluble
Recent Examples of Synonyms for insoluble
Adjective
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This level of customization would be nearly impossible to achieve manually across dozens of job applications while maintaining consistency and quality.—
Caroline Castrillon,
Forbes.com,
20 July 2025
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The neutral cushions are bleach-cleanable and nearly impossible to stain.—
Mariana Best,
Better Homes & Gardens,
20 July 2025
Adjective
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How to get your love letter stamped from Valentine, Texas For more than three decades, the small-town Valentine Post Office — also known as the Love Station — has processed thousands of love letters from hopeless romantics around the world.—
Brandi D. Addison,
Austin American Statesman,
2 July 2025
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Marcus Hopkins has been trying to have his criminal record expunged for years, a process which left him hopeless.—
Rebecca-Ann Jattan,
Sacbee.com,
26 June 2025
Cite this Entry
“Insoluble.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insoluble. Accessed 30 Jul. 2025.
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