unbreathable

English

Etymology

un- +‎ breathable

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.
  2. Not letting air seep through.
    an unbreathable fabric
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