unventilated

Navalny’s team was particularly alarmed when he could not be found because he had been ill and reportedly was being denied food and kept in an unventilated cell.

Unless you’re constantly burning hundreds of candles in an unventilated space, however, he adds candle emissions are unlikely to cause health effects in humans.

Egyptian mummification, aimed at eternity, bears little resemblance to modern American embalming, which began during the Civil War, when bodies of soldiers had to be transported on hot, unventilated trains.

Living in these wet, unhygienic and unventilated conditions led to illness, and cholera was rife.

Mosquitoes love the dark, humid, and unventilated spaces so often inhabited by India's poorest residents, said Dhiman.