sweltry

At last they came out of the sweltry dining-halls into the fresh evening of Lilar, into the open air and freedom.

The day was intensely hot, and at that early hour the fierce fire of the sun had rendered the atmosphere sweltry and oppressive.

O horrible those sweltry places are, Where the sun comes so close, it makes the earth Burn in a frenzy of breeding,—smoke and flame Of lives burning up from agoniz'd loam!