unbreathable

Adj

Not suitable for breathing.
Not letting air seep through.

Examples

an unbreathable fabric
The atmosphere on Venus is an unbreathable mixture of carbon dioxide and sulphuric acid, amongst other things.

Origin / Etymology

From un- + breathable.

Synonyms

irrespirable

Scrabble Score: 19

unbreathable: valid Scrabble (US) TWL Word
unbreathable: valid Scrabble Word in Merriam-Webster MW Dictionary
unbreathable: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 23

unbreathable: valid Words With Friends Word