as in harmful
causing or capable of causing harm
the pernicious effects of illegal narcotics on society
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Recent Examples of pernicious
On the surface, dietary advice to eat more vegetables hardly seems pernicious.
—
Rachel Hope Cleves / Made By History, TIME, 14 Feb. 2025
Eggs have become vivid symbols of Americans’ frustration over the pernicious inflation of recent years.
—Laura Washington, Chicago Tribune, 12 Feb. 2025
One example was that the law capped the pernicious state and local tax deduction at $10,000.
—The Editors, National Review, 10 Feb. 2025
The pernicious effects of bias also play out in the workplace—with negative consequences for individuals and organizations.
—Iris Bohnet, Big Think, 28 Jan. 2025
See All Example Sentences for pernicious
Rachel Hope Cleves / Made By History, TIME, 14 Feb. 2025
Eggs have become vivid symbols of Americans’ frustration over the pernicious inflation of recent years.
—Laura Washington, Chicago Tribune, 12 Feb. 2025
One example was that the law capped the pernicious state and local tax deduction at $10,000.
—The Editors, National Review, 10 Feb. 2025
The pernicious effects of bias also play out in the workplace—with negative consequences for individuals and organizations.
—Iris Bohnet, Big Think, 28 Jan. 2025
See All Example Sentences for pernicious
Recent Examples of Synonyms for pernicious
Adjective
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One of the most common and harmful examples is the Social Security Administration phishing scam, which targets unsuspecting individuals with alarming and deceptive messages.—
Kurt Knutsson,
FOXNews.com,
6 July 2025
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The Consumer Product Safety Commission was created by Congress in 1972 and tasked with shielding consumers from injury or death from defective or harmful products.—
Mike Scarcella,
USA Today,
3 July 2025
Adjective
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Don’t forget the sunscreen Looking toward the rest of that sun protection, a broad-spectrum, water-resistant sunscreen with an SPF of at least 30 will often be sufficient to protect your skin from dangerous UV radiation.—
Kansas City Star,
Kansas City Star,
11 July 2025
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Making Their Lives Too Easy Wealth without work creates a dangerous illusion.—
Anatoly Iofe,
Forbes.com,
11 July 2025
Adjective
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These dams have detrimental ecological impacts in an area that is already experiencing a high amount of litter.—
Ruby Grisin,
The Courier-Journal,
11 July 2025
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In addition to the risks of dehydration and heat illness, exposure to the sun is detrimental to your skin.—
Heidi Moawad,
Verywell Health,
10 July 2025
Adjective
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Texas and the Upper Midwest could continue to see strong to severe thunderstorms with damaging winds and hail through the weekend.—
Taylor Ward,
CNN Money,
4 July 2025
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Be prepared for damaging winds, lightning and possibly large hail.—
ABC News,
ABC News,
3 July 2025
Adjective
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Possible issues associated with consuming too much of the spice include allergic reactions (that can range from mild irritation to serious symptoms), stomach pain and potential adverse interactions with medications such as blood thinners.—
Daryl Austin,
USA Today,
11 July 2025
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Earth’s magnetic field naturally protects living things and Earth-orbiting satellites from most adverse effects of space weather.—
Mojtaba Akhavan-Tafti,
The Conversation,
11 July 2025
Cite this Entry
“Pernicious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/pernicious. Accessed 16 Jul. 2025.
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