English edit

Etymology edit

From un- +‎ breathable.

Adjective edit

unbreathable (comparative more unbreathable, superlative most unbreathable)

  1. Not suitable for breathing.
    Synonym: irrespirable
    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

Translations edit