stuffy
1 airless, close, fetid, frowsty, fuggy, heavy, muggy, oppressive, stale, stifling, suffocating, sultry, unventilated
2 as dry as dust, conventional, deadly, dreary, dull, fusty, humourless, musty, niminy-piminy, old-fashioned, old-fogeyish, pompous, priggish, prim, prim and proper, staid, stilted, stodgy, strait-laced, uninteresting
Antonyms
1 airy, breezy, cool, draughty, fresh, gusty, pleasant, well-ventilated