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
These distinctions are useful to understand fiber’s benefits, but practically speaking, any whole plant food will offer a mix of soluble and insoluble fibers, packing all of the related health payoffs.
—
Matt Fuchs, Time, 25 Mar. 2026
Prunes offer both soluble and insoluble fiber, proving especially helpful for the regularity challenges that often come with GLP-1s.
—Lauren Manaker, SELF, 10 Mar. 2026
Shawn and Gregory have been grappling with the insoluble problem of just how much of one’s life one can or even should be fully alive to for half a century.
—Sara Holdren, Vulture, 6 Mar. 2026
Why Fiberlayering Is Better Than Fibermaxxing Fiber is often grouped as soluble, insoluble, and resistant starch.
—Kathleen Ferraro, Verywell Health, 5 Mar. 2026
See All Example Sentences for insoluble
Matt Fuchs, Time, 25 Mar. 2026
Prunes offer both soluble and insoluble fiber, proving especially helpful for the regularity challenges that often come with GLP-1s.
—Lauren Manaker, SELF, 10 Mar. 2026
Shawn and Gregory have been grappling with the insoluble problem of just how much of one’s life one can or even should be fully alive to for half a century.
—Sara Holdren, Vulture, 6 Mar. 2026
Why Fiberlayering Is Better Than Fibermaxxing Fiber is often grouped as soluble, insoluble, and resistant starch.
—Kathleen Ferraro, Verywell Health, 5 Mar. 2026
See All Example Sentences for insoluble
Recent Examples of Synonyms for insoluble
Adjective
-
The message was impossible to miss.—
Rick Stroud,
The Orlando Sentinel,
9 May 2026
-
Predictions are sometimes simply impossible to make, Velíz writes, which doesn’t stop people from trying to make them.—
Joshua Rothman,
New Yorker,
8 May 2026
Adjective
-
To Some New Island Guests With a competitive streak a mile wide, Penny (Roorbach) is charming, popular, and a hopeless romantic – for now, anyway.—
Nellie Andreeva,
Deadline,
7 May 2026
-
This behavior has become epidemic in our voyeuristic and hopeless society.—
Voice of the People,
New York Daily News,
4 May 2026
Cite this Entry
“Insoluble.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insoluble. Accessed 9 May. 2026.
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