HSK 7-9
闷热
mēnrè形
sultry; sultriness; hot and stuffy; stifling hot
雨后的车厢里格外闷热。
Yǔhòu de chēxiāng lǐ géwài mēnrè.
The carriage was especially hot and stuffy after the rain.
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Appears across levels (7-9) in the HSK 3.0 word list.