stuffy
Definitions
Lacking fresh air or ventilation; close and oppressive.
Blocked or congested, especially referring to the nose.
Formal, conventional, or old-fashioned in a way that is boring or narrow-minded.
Examples
The room felt stuffy because the windows had been closed all day.
I have a stuffy nose and a sore throat from this cold.
The meeting was incredibly stuffy, with everyone wearing formal suits and speaking in hushed tones.