as in hazardous
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Recent Examples of Synonyms for ultrahazardous
Adjective
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Remain out of the water to avoid hazardous surf and NEVER turn your back on the ocean.—
CA Weather Bot,
Sacbee.com,
4 Feb. 2026 -
Coming back from the dead can be hazardous to your health.—
Sydney Bucksbaum,
Entertainment Weekly,
4 Feb. 2026
Adjective
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In order to rule in her favor, jurors will have to parse the harmful actions of fellow users — including her high school bullies and adult men sending her unsolicited nudes — from design decisions made by the companies themselves.—
Sonja Sharp,
Los Angeles Times,
9 Feb. 2026
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Many of these jars contain unknown or poorly documented chemical mixtures that could be toxic to humans or harmful to the specimens themselves if disturbed.—
Neetika Walter,
Interesting Engineering,
9 Feb. 2026
Adjective
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The opposite, overwatering, is also detrimental because the seeds may rot.—
Megan Hughes,
Better Homes & Gardens,
28 Jan. 2026
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There’s been tension between the dynamic guard and head coach Tuomas Iisalo and some of that started after the Grizzlies lost to the Lakers in October in which Morant scored only eight points and was later suspended for one game for conduct detrimental to the team for postgame comments.—
Broderick Turner,
Los Angeles Times,
28 Jan. 2026
Adjective
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Without reliably cold temperatures, snow is wetter and thinner, conditions are rainier — and for athletes that can be dangerous.—
Laura Paddison,
CNN Money,
10 Feb. 2026
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Luge is the most dangerous of the three sliding sports (bobsled and skeleton are the others) — ironic because athletes in that event actually have the most control.—
Lindsay Schnell,
New York Times,
9 Feb. 2026
Adjective
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Secretary of State Marco Rubio, whose parents left Cuba a few years before Fidel Castro took power, has eyed the regime in Havana as one of the world’s most pernicious, inhumane and troublesome.—
Daniel DePetris,
Chicago Tribune,
3 Feb. 2026
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America’s pernicious relationship with Haiti comes to a head once more this week.—
Ruth Jean-Marie,
Time,
3 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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That agreement committed both nations to consult on security issues and respond to adverse challenges.—
NINIEK KARMINI,
Arkansas Online,
8 Feb. 2026
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This fragmentation creates blind spots that contribute to adverse drug events, duplication of therapy and inefficient care and harms that ultimately drive up total health care costs.—
Sreedhar Potarazu,
Baltimore Sun,
7 Feb. 2026
Adjective
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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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Studies have shown that routine use of AI has a deleterious impact on cognition, creativity, recall, and critical thinking.—
Krista Kafer,
Denver Post,
25 Jan. 2026
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Cite this Entry
“Ultrahazardous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/ultrahazardous. Accessed 11 Feb. 2026.
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