Wiktionary
oxygenless
a. 1 lacking oxygen 2 (context of mountain climbing English) not assisted with oxygen
Usage examples of "oxygenless".
Bond followed her, holding his breath against the searing impact of the Arctic, oxygenless air.
Langdon took advantage of the motion, inhaling what felt like an oxygenless breath and heaving again.
Venus must be unfitted to support human life, that where her surface is not unutterably hot it is unutterably cold, even though she be oxygenless, as they aver, yet the urge to live that is born with each of us compelled me to make the same preparations to land that I should have had I successfully reached my original goal, Mars.