# insoluble

/ˌɪnˈsɑɫjəbəɫ/ (US) · /ɪnsˈɒljuːbəl/ (UK) · CEFR C1 · Adjective

Source: https://englishreference.com/word/insoluble
Updated: 2026-05-20

## Definition

describing a problem or situation that cannot be fixed or explained. It also describes a substance that cannot be dissolved in a liquid.

For teachers: incapable of being solved, explained, or dissolved in a particular solvent. Often used to describe complex or persistent problems that defy resolution.

## Examples

- The two companies have an insoluble problem.
- The scientist discovered that the new polymer was insoluble in water, making it difficult to clean up.
- The conflict between the two nations reached an insoluble point, as neither side was willing to compromise on its core territorial claims.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.