as in hazardous
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Recent Examples of Synonyms for ultrahazardous
Adjective
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Take every precaution to never leave young children and pets alone in vehicles, especially in extreme heat when car interiors can quickly become hazardous.—
CA Weather Bot,
Sacbee.com,
17 Mar. 2026 -
And while the area's temperatures are rather lovely year-round, the region's increasingly hazardous air pollution makes visits from February through March seriously uncomfortable.—
Condé Nast,
Condé Nast Traveler,
17 Mar. 2026
Adjective
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This method takes too long—by the time the soup is fully thawed, there is a high risk that harmful bacteria have already grown.—
Riley Wofford,
Martha Stewart,
16 Mar. 2026
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This can introduce impurities or harmful microorganisms to the bathroom environment as a result.—
Ethan Stone,
USA Today,
15 Mar. 2026
Adjective
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Some foods stood out as especially neuroprotective or detrimental.—
Dr. Sumana Kondle,
ABC News,
17 Mar. 2026
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Trump has faced criticism for policies seen as detrimental to gay, transgender and nonbinary individuals.—
Nimi Princewill,
CNN Money,
16 Mar. 2026
Adjective
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The private weather service AccuWeather calculated that more than 200 million people were under threat Monday of some kind of dangerous weather.—
Arkansas Online,
Arkansas Online,
17 Mar. 2026
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Prominent quartz slab makers acknowledge that processing produces dangerous dust, but claim risks are avoidable.—
Ethan Baron,
Mercury News,
16 Mar. 2026
Adjective
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So when and why did humans fall prey to such a pernicious threat?—
Andrew Paul,
Popular Science,
26 Feb. 2026
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While critiques of America’s pernicious gambling culture and hypocritical application to athletes never overwhelm the story (or even develop beyond a few jabs per episode), Season 1 lays the groundwork to delve deeper later on while hitting plenty of targets here and now.—
Ben Travers,
IndieWire,
23 Feb. 2026
Adjective
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Elkayam and Sklar were both arrested the day after their son’s death for fentanyl possession and acting in a manner injurious to a child.—
Roni Jacobson,
New York Daily News,
3 Feb. 2026
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According to the lawsuit, staff members told parents their children's injuries were the result of self-injurious behavior.—
Karen Morfitt,
CBS News,
9 Jan. 2026
Adjective
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So borrowers who want to lock in a low mortgage rate may want to consider their options now, before any adverse conditions result in an increase.—
Matt Richardson,
CBS News,
19 Mar. 2026
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Other provisions require federal agencies to report the job effects of AI, and for the Department of Energy to collect data on the likelihood of adverse AI incidents.—
Ted Johnson,
Deadline,
18 Mar. 2026
Adjective
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In July of last year Steyer sent out a tweet criticizing rent control for its deleterious and counterproductive effects.—
Rafael Perez,
Oc Register,
1 Mar. 2026
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Conversely, cannabis appears to be especially deleterious to the cognitive and psychological well-being of young people.—
Alexander Nazaryan,
New Yorker,
29 Jan. 2026
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Cite this Entry
“Ultrahazardous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/ultrahazardous. Accessed 23 Mar. 2026.
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