Dictionary:

airless

  (âr'lĭs)

1. Having no air.
2. Lacking fresh air; stuffy.
3. Lacking movement of air; still.

adjective

1. Oppressive due to a lack of fresh air: close, stifling, stuffy. See breath/breathlessness, open/close.
2. Marked by an absence of circulating air: breathless, breezeless, still, windless. See breath/breathlessness.

Definition: stuffy
Antonyms: airy, ventilated

Tutor's tip: If you don't have any air, you're "airless"; if you don't have any hair, your "hairless"; and if you don't have any heirs (ones who inherit property), your "heirless."