airless
Definitions
Lacking fresh air; stuffy or stagnant.
Lacking an atmosphere; vacuum-like.
Lacking movement of air; still or windless.
Examples
The small, airless room felt stifling after we had been inside for an hour.
The astronauts stepped out onto the airless surface of the moon, protected only by their pressurized suits.
Synonyms
stuffy suffocating stagnant unventilated close muggy breathless