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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Poggi deemed that an impossible request.—
Austin Meek,
New York Times,
14 Sep. 2025
-
Farmers are facing impossible choices.—
Phil Lempert,
Forbes.com,
13 Sep. 2025
Adjective
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Nearly half of them reported feeling down, depressed or hopeless and experiencing sleep disturbances.—
Alexis Kayser,
MSNBC Newsweek,
10 Sep. 2025
-
The movie stars Michael Johnston and Inde Navarrette in a story about a hopeless romantic who makes a wish that his long-time crush falls in love with him.—
Anthony D'Alessandro,
Deadline,
7 Sep. 2025
Cite this Entry
“Insoluble.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insoluble. Accessed 18 Sep. 2025.
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