INSOLUBLE Synonyms: 70 Similar and Opposite Words

insoluble

adjective

(ˌ)in-ˈsäl-yə-bəl

Definition of insoluble

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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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of insoluble Indeed, the only shooting victims shown (in several devastating flashes) are the heart of the film’s insoluble sorrows. — Ryan Lattanzio, IndieWire, 25 May 2026 Barley Barley is high in insoluble and soluble fiber, especially beta-glucan. — Brittany Lubeck, Verywell Health, 2 July 2026 The insoluble character of Alfa’s best records is reflected in his biography, which is difficult to neatly summarize. — H.d. Angel, Pitchfork, 16 June 2026 Improve Gut Health Oats are a source of insoluble and soluble fiber, like beta-glucan, a component of nutrient-rich complex carbohydrates. — Randi Gollin, Martha Stewart, 1 July 2026 See All Example Sentences for insoluble

Recent Examples of Synonyms for insoluble

Adjective

The ombudsmen point to impossible care burdens that cause burnout, irregular schedules, lack of training and the difficulty of taking care of seniors who, in previous decades, would have qualified for hospital care.

— Bruce Finley, Denver Post, 5 July 2026
Shrouded completely in a thick, poisonous cloud cover, its surface is obviously impossible to observe.

— Mike Lynch, Twin Cities, 5 July 2026

Definition of impossible

Adjective

The 41-year-old Portuguese footballer managed to put two past a hopeless Uzbekistan, becoming the first player to score in six consecutive World Cups.

— Scott Roxborough, HollywoodReporter, 29 June 2026
The conflict feels contemporary without growing too cynical, and the core relationship stakes seem real without skewing hopeless.

— Alison Foreman, IndieWire, 19 June 2026

Definition of hopeless

Browse Nearby Words

insolents

insoluble

insolvable

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“Insoluble.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insoluble. Accessed 8 Jul. 2026.

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Synonyms of insoluble

adjective

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