SMOG
smog, smogginess
(noun) air pollution by a mixture of smoke and fog
Source: WordNet® 3.1
Etymology
Noun
smog (countable and uncountable, plural smogs)
A noxious mixture of particulates and gases that is the result of urban air pollution.
Synonyms: pea-souper, pea-soup fog
Hyponyms
• black smog (combination of smoke and fog; stereotypical 19th century London smog)
• photochemical smog (brown haze and ozone; stereotypical 1980s Los Angeles afternoon smog)
• summer smog
Verb
smog (third-person singular simple present smogs, present participle smogging, simple past and past participle smogged)
(informal) To get a smog check; to check a vehicle or have it checked for emissions.
Anagrams
• GMOs, goms, mogs
Source: Wiktionary