miasma

as in cloud
a vapor of something unpleasant or unhealthy A miasma of smog settled over the city. a miasma of foul-smelling smoke

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“Miasma.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/miasma. Accessed 24 Jun. 2024.

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