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
Resolution of this tragic dynamic appears insoluble.
—
David Marks, The Orlando Sentinel, 8 Aug. 2025
Soluble fiber can help lower cholesterol levels and stabilize blood sugar, while insoluble fiber can support digestion, regular bowel movements and prevention of constipation.
—Renée Onque, CNBC, 31 July 2025
There are two types of dietary fiber: soluble and insoluble, experts said.
—Kristen Rogers, CNN Money, 26 July 2025
Seaweed, particularly sugar kelp, naturally fills these gaps with a potent mix of insoluble fibers such as fucoidan, beta-glucan, alginate, and cellulose.
—Dianne Plummer, Forbes.com, 18 July 2025
See All Example Sentences for insoluble
David Marks, The Orlando Sentinel, 8 Aug. 2025
Soluble fiber can help lower cholesterol levels and stabilize blood sugar, while insoluble fiber can support digestion, regular bowel movements and prevention of constipation.
—Renée Onque, CNBC, 31 July 2025
There are two types of dietary fiber: soluble and insoluble, experts said.
—Kristen Rogers, CNN Money, 26 July 2025
Seaweed, particularly sugar kelp, naturally fills these gaps with a potent mix of insoluble fibers such as fucoidan, beta-glucan, alginate, and cellulose.
—Dianne Plummer, Forbes.com, 18 July 2025
See All Example Sentences for insoluble
Recent Examples of Synonyms for insoluble
Adjective
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Apple has leaned more into natural photographic output, but the extra creative power and the ability to capture impossible shots that the Pixel 10 Pro offers a more attractive story to users.—
Ewan Spence,
Forbes.com,
8 Sep. 2025
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For millions of elderly or disabled people, these were daunting or impossible options.—
Eli Hager,
ProPublica,
8 Sep. 2025
Adjective
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But the situation is not hopeless.—
Charlie Warzel,
The Atlantic,
4 Sep. 2025
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Dealing with the horrors of the situation in Gaza within the sterile environment of a call center, its workers are feeling increasingly hopeless, caught in the political crossfire of an escalating situation.—
Damon Wise,
Deadline,
3 Sep. 2025
Cite this Entry
“Insoluble.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insoluble. Accessed 10 Sep. 2025.
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