Definition of unbreathable
: not fit for being breathed
Recent Examples of unbreathable from the Web
Their two-stroke engines created a tremendous din, and the cars belched out an acrid smoke making the new breath of freedom almost unbreathable.
A trip to the red planet is like visiting an even more inhospitable Antarctica, and its unbreathable atmosphere is less than two percent of what you’d find at Everest’s summit.
Living on Mars, with its unbreathable atmosphere, lack of liquid surface water, and toxic soil, will challenge the hardiest of astronauts.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unbreathable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of unbreathable
Seen and Heard
What made you want to look up unbreathable? Please tell us where you read or heard it (including the quote, if possible).