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
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
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Johna Burdeos, Health, 4 Dec. 2024
Yet the dilemmas posed by partition long predate 1967 and stem from a fundamentally insoluble problem.
—Yousef Munayyer, Foreign Affairs, 15 Oct. 2019
Many plant foods contain both soluble and insoluble fiber, but certain grains, like oats and barley, as well as beans, fruits, and vegetables, are particularly rich in soluble fiber.
—Johna Burdeos, Health, 4 Dec. 2024
In addition, zucchini is a good source of insoluble and soluble fiber, which helps stabilize blood sugar and decrease the risk of heart disease.
—Bethany Thayer, Detroit Free Press, 28 Sep. 2024
See all Example Sentences for insoluble 
Johna Burdeos, Health, 4 Dec. 2024
Yet the dilemmas posed by partition long predate 1967 and stem from a fundamentally insoluble problem.
—Yousef Munayyer, Foreign Affairs, 15 Oct. 2019
Many plant foods contain both soluble and insoluble fiber, but certain grains, like oats and barley, as well as beans, fruits, and vegetables, are particularly rich in soluble fiber.
—Johna Burdeos, Health, 4 Dec. 2024
In addition, zucchini is a good source of insoluble and soluble fiber, which helps stabilize blood sugar and decrease the risk of heart disease.
—Bethany Thayer, Detroit Free Press, 28 Sep. 2024
See all Example Sentences for insoluble
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Cite this Entry
“Insoluble.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insoluble. Accessed 21 Feb. 2025.
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