Word.ws English Dictionary

unbreathable

unbreathable adjective: not suitable for breathing.

Adjective

unbreathable (comparative more unbreathable, superlative most unbreathable)

  1. Not suitable for breathing.
    • The atmosphere on Venus is an unbreathable mixture of carbon dioxide and sulphuric acid, amongst other things.
    • The air was not just thick, it was unbreathable.2020, Avni Doshi, Burnt Sugar, Hamish Hamilton, page 19
    Synonyms:
    irrespirable
  2. Not letting air seep through.
    • an unbreathable fabric

Synonyms of unbreathable

Forms of unbreathable

comparativemore unbreathable
superlativemost unbreathable

Origin of unbreathable

From un- + breathable.

Words formed from unbreathable

Questions about unbreathable

What does unbreathable mean?
Unbreathable means not suitable for breathing.
What part of speech is unbreathable?
Unbreathable is an adjective.

Words near unbreathable in the dictionary

  1. unbreast
  2. unbreasted
  3. unbreasting
  4. unbreasts
  5. unbreathability
  6. unbreathable
  7. unbreathably
  8. unbreatheable
  9. unbreathed
  10. unbreathing
  11. unbreathy

Source and license

Adapted from Wiktionary: unbreathable (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “unbreathable.” Word.ws, https://word.ws/unbreathable. Based on Wiktionary, CC BY-SA 4.0.