stuffy
adjective /ˈstʌfi/
  /ˈstʌfi/
(comparative stuffier, superlative stuffiest)
- (of a building, room, etc.) warm in an unpleasant way and without enough fresh air
- a stuffy room
 - It gets very hot and stuffy in here in summer.
 
Extra Examples- It gets really stuffy in here in summer.
 - My parents are being a bit stuffy about me living in London on my own.
 - She had always seemed so stuffy and plain.
 - The room was stuffy with the smell of socks and sweat.
 
 - (informal, disapproving) very serious, formal, boring or old-fashioned
- a stuffy, formal family
 - plain, stuffy clothes
 
 - (especially North American English) if you have a stuffy nose, your nose is blocked because you have a cold