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
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
Key sources of fiber, both soluble and insoluble, include seeds, beans, lentils, whole grains and vegetables.
—Kaitlin Sullivan, NBC news, 29 Apr. 2026
The seeds are rich in both soluble and insoluble fiber, helping to feed gut bacteria while also promoting regular bowel movements, research has shown.
—Deirdre Bardolf, FOXNews.com, 27 Apr. 2026
Wheat bran is primarily insoluble fiber with a little protein, fat and phenolic compounds.
—The New York Times News Service Syndicate, San Diego Union-Tribune, 15 Apr. 2026
See All Example Sentences for insoluble
Maria Godoy, NPR, 18 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
The seeds are rich in both soluble and insoluble fiber, helping to feed gut bacteria while also promoting regular bowel movements, research has shown.
—Deirdre Bardolf, FOXNews.com, 27 Apr. 2026
Wheat bran is primarily insoluble fiber with a little protein, fat and phenolic compounds.
—The New York Times News Service Syndicate, San Diego Union-Tribune, 15 Apr. 2026
See All Example Sentences for insoluble
Recent Examples of Synonyms for insoluble
Adjective
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But in practice, solving that equation directly and exactly for a system with as many interacting electrons as FeMo-co has is often impossible.—
Quanta Magazine,
Quanta Magazine,
29 May 2026
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How long the recovery will take is impossible to know.—
Jeffrey Kluger,
Time,
29 May 2026
Adjective
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On May 18, Venus will conclude its journey through the flirtatious and thought-provoking sign of Gemini and enter the sentimental and hopeless romantic sign of Cancer.—
Valerie Mesa,
PEOPLE,
18 May 2026
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That reality makes the climb for promising teams like the Magic feel almost hopeless.—
Mike Bianchi,
The Orlando Sentinel,
14 May 2026
Cite this Entry
“Insoluble.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insoluble. Accessed 31 May. 2026.
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