stuffy
stuf-fy
adjective
Old-fashioned, formal, and lacking imagination, humour, or openness.
"He's rather stuffy for a young man."
adjective
Unpleasantly warm and lacking fresh air, making breathing uncomfortable.
"It's a bit stuffy in here, isn't it?"
Thesaurus
Synonyms: unaired, close, unventilated, airless, stodgy, conventional, obstructed