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Definition of insoluble

insoluble

/ɪnˈsɑːljʊbəl/
in · sol · u · ble
Adverb:insolubly
•
Plural:insolubles
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insoluble Lexical Profile

insoluble Game Scores & Validity

• adjective

1

Incapable of being dissolved in a liquid, especially water.

Example

"Chalk and sand are largely insoluble in water, settling at the bottom of the beaker."

2

Impossible to solve, resolve, or explain.

Example

"The negotiators faced what appeared to be an insoluble conflict over territorial boundaries."

Synonyms
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Antonyms
View all antonyms for insoluble

• noun

1

An insoluble substance, particle, or compound, or a problem that cannot be solved.

Example

"The filtration process removes suspended insolubles from the crude oil before refinement."

Word Nuance & Usage

While 'insoluble' and 'insolvable' both describe problems that cannot be solved, only 'insoluble' is used in chemistry and physics to describe a substance that cannot be dissolved in a liquid.

• Rhymes for insoluble

• Nearby Words

insolence
insolent
insolently
insoluble
insolvable
insolvency
insolvent

Word Origin & Etymology

Borrowed in Middle English via Old French from Latin 'insolubilis' ('that cannot be loosened'), formed from the privative prefix 'in-' ('not') and 'solubilis', from the verb 'solvere' ('to loosen, untie, or dissolve').

Cite this Entry

Wordmom. (2026). Definition of Insoluble. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/insoluble
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