Stuffy
WordNet
adjective
(1) Excessively conventional and unimaginative and hence dull
"Why is the middle class so stodgy, so utterly without a sense of humor?"
"A stodgy dinner party"
(2) Affected with a sensation of stoppage or obstruction
"A stuffy feeling in my chest"
(3) Lacking fresh air
"A dusty airless attic"
"The dreadfully close atmosphere"
"Hot and stuffy and the air was blue with smoke"