insoluble

adjective

(ˌ)in-ˈsäl-yə-bəl How to pronounce insoluble (audio)
Definition of insolublenext
as in impossible
incapable of being solved or accomplished the seemingly insoluble mystery concerning the identity of the people who built these ancient structures

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms

Example Sentences

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 The fiber in mangoes and papayas includes both soluble and insoluble fiber. — Vanessa Caceres, Verywell Health, 23 Sep. 2026 Apples also contain multiple types of fiber, including soluble fiber (which promotes healthy cholesterol levels) and insoluble fiber (which benefits digestion), says Elick. — Kirsten Nunez, Martha Stewart, 31 Aug. 2026 Fiber, including both soluble and insoluble fiber, play critical roles in gut health. — Jillian Kubala, HEALTH, 4 Aug. 2026 See All Example Sentences for insoluble
Recent Examples of Synonyms for insoluble
  1. impossible
  2. hopeless
Adjective
  • The technique has revolutionized neuroscience by opening up the brain's activity to scientists in ways previously impossible.
    — Jackie Flynn Mogensen, Scientific American, 5 Oct. 2026
  • These Chargers have 13 games left, and identifying potential wins on the remaining schedule is a nearly impossible task.
    — Los Angeles Times, Los Angeles Times, 5 Oct. 2026
Definition of impossible
Adjective
  • Johnston, who made his breakout performance as the toxically hopeless romantic Bear in Curry Barker’s Obsession, has most recently been in talks to join Brendan Fraser and Rachel Weisz in the upcoming fourth installment of The Mummy.
    — Glenn Garner, Deadline, 7 Oct. 2026
  • For all the apocalyptic overtones in the film, Gibney doesn’t want audiences to come away feeling hopeless.
    — Los Angeles Times, Los Angeles Times, 6 Oct. 2026
Definition of hopeless

Browse Nearby Words

insolents
insoluble
insolvable
See all Nearby Words

Cite this Entry

“Insoluble.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/insoluble. Accessed 10 Oct. 2026.

Copy Citation
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Last Updated: - Updated example sentences

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of Luddite

See Definitions and Examples »

Popular in Grammar & Usage

See More

Do You Need a New Language Peeve?

The Exceptions of '-s' and '-es' Plurals

Merriam-Webster’s Great Big List of Words You Love to Hate

Is it 'nerve-racking' or 'nerve-wracking'?

What's the difference between 'fascism' and 'socialism'?
See More

Popular in Wordplay

See More

The Real Origin of 'Supercalifragilistic'

9 Words That Sound Like Insults But Aren't

7 Words for Bad Endings and Rough Situations

The Words of the Week - Oct. 9

Even More Bird Names that Sound Like Insults (and Sometimes Are)
See More

Popular

See More

Do You Need a New Language Peeve?

The Real Origin of 'Supercalifragilistic'

9 Words That Sound Like Insults But Aren't
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
a cup of tea and a golf ball on tee side by side
Quiz: Sounds Like... Choose the word that sounds like it fits the clue...
See All