unbreathable
adjective
unbreathable is spelled U-N-B-R-E-A-T-H-A-B-L-E: 12 letters. It appears about once in every 35 million words in written English, the 182,517th most frequent word form (wordfreq, 2021 data). As an adjective, unbreathable means “Not suitable for breathing” (English Wiktionary, September 2026).
How many letters and syllables are in unbreathable?
| Letters | 12: U-N-B-R-E-A-T-H-A-B-L-E |
|---|---|
| In writing | about once in every 35 million words; the 182,517th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is unbreathable?
Unbreathable appears about once in every 35 million words in written English, the 182,517th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Forms of unbreathable
- more unbreathable comparative
- most unbreathable superlative
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does unbreathable mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Not suitable for breathing.
The atmosphere on Venus is an unbreathable mixture of carbon dioxide and sulphuric acid, amongst other things.
- 2
Not letting air seep through.
an unbreathable fabric
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Unbreathable in Spanish, French, German and Portuguese
In the sense not suitable for breathing:
| Language | Words |
|---|---|
| French | irrespirable |
| Portuguese | irrespirável |
| Spanish | irrespirable |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does unbreathable come from?
From un- + breathable.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).