airless[adjective]Synonyms: stuffy, close, heavy, muggy, oppressive, stifling, suffocating, sultry
[TahlilGaran] English Synonym Dictionary ▲
air‧less /ˈeələs $ ˈer-/
adjective airless places or conditions are unpleasant because there is not enough fresh air ⇒
airy:
an airless room [TahlilGaran] Dictionary of Contemporary English ▲