unbreathable.
Not suitable for breathing.
Meaning & usage
Not suitable for breathing.
The atmosphere on Venus is an unbreathable mixture of carbon dioxide and sulphuric acid, amongst other things.
Not letting air seep through.
an unbreathable fabric
Where this word comes from
Etymology tree English un- Middle English breethder. Middle English brethen English breathe Proto-Indo-European *-dʰlom Proto-Italic *-ðlom Proto-Italic *-ðlis Latin -bilis Latin -ābilis Old French -ablebor. Middle English -able English -able English breathable English unbreathable From un- + breathable.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.