1
as in sick
temporarily suffering from a disorder of the body
an unsound horse that will have to be disqualified from the race
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in unreasonable
not using or following good reasoning
it is clearly unsound to argue that just because a scientific explanation for that phenomenon does not currently exist, no such explanation is possible
Synonyms & Similar Words
Antonyms & Near Antonyms
3
as in insane
unable to think in a clear or sensible way
disgruntled relatives tried to prove that the woman was of unsound mind when she made her will
Synonyms & Similar Words
Antonyms & Near Antonyms
4
as in erroneous
not being in agreement with what is true
an unsound and pernicious stereotype
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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Recent Examples of unsound
Public health experts say both moves are scientifically unsound and would essentially upend the nation's childhood vaccination regimen, leaving children vulnerable to diseases that had long been brought under control.
—
NPR, 20 Nov. 2025
Under the Fed’s new rules, banks can only be tested for material risks to their businesses or balance sheets, such as bad loans or unsound business practices.
—Christopher Rugaber, Fortune, 19 Nov. 2025
The club very quickly became structurally unsound.
—Chris Weatherspoon, New York Times, 3 Nov. 2025
By 1948, decades of patchwork repairs, design flaws and war damage left the mansion structurally unsound, according to the White House Historical Association.
—Jordan King, MSNBC Newsweek, 24 Oct. 2025
See All Example Sentences for unsound
NPR, 20 Nov. 2025
Under the Fed’s new rules, banks can only be tested for material risks to their businesses or balance sheets, such as bad loans or unsound business practices.
—Christopher Rugaber, Fortune, 19 Nov. 2025
The club very quickly became structurally unsound.
—Chris Weatherspoon, New York Times, 3 Nov. 2025
By 1948, decades of patchwork repairs, design flaws and war damage left the mansion structurally unsound, according to the White House Historical Association.
—Jordan King, MSNBC Newsweek, 24 Oct. 2025
See All Example Sentences for unsound
Recent Examples of Synonyms for unsound
Adjective
-
Olsky's mother, under 70 pounds and nine months pregnant, was put in the sick car on the train, surrounded by sick and dying women.—
Lesley Stahl,
CBS News,
16 Feb. 2026
-
Edgar finds them together, gets angry and Cathy gets even sicker.—
Meg Walters,
Glamour,
16 Feb. 2026
Adjective
-
During a bumpy, contentious negotiation, hospitals complained the union’s demands were unreasonable and exorbitant.—
Philip Marcelo,
Fortune,
20 Feb. 2026
-
Imagine my surprise and delight when Billboard actually took a stand against YouTube and did not give in to their unreasonable demands!—
Ethan Millman,
HollywoodReporter,
20 Feb. 2026
Adjective
-
Your day-to-day life would be insane!—
Denise Petski,
Deadline,
18 Feb. 2026
-
Defense lawyers had argued during the trial that Taylor was legally insane at the time of the offense.—
Claire Osborn,
Austin American Statesman,
18 Feb. 2026
Adjective
-
Cubs and White Sox pitchers and catchers are working out in Arizona at the start of spring training, but unless Sox general manager Chris Getz says something erroneous again, nothing much is expected to happen until the Cactus League schedule begins Friday.—
Paul Sullivan,
Chicago Tribune,
15 Feb. 2026
-
Congress foolishly downsized that number in the 1980s and ’90s on the erroneous belief that more doctors would encourage unnecessary health care consumption.—
Betsy McCaughey,
Boston Herald,
8 Feb. 2026
Adjective
-
This fragmented model creates friction and quietly drains profitability through unbilled hours, margin erosion from poorly staffed projects and elevated turnover when top talent hits operational roadblocks.—
DJ Paoni,
Forbes.com,
10 Sep. 2025
-
For however poorly things are going — and the bad tone set by the starters has leaked into some defensive lapses and some pressing at the plate — the Padres got themselves into a really favorable position before this.—
Kevin Acee,
San Diego Union-Tribune,
4 Sep. 2025
Adjective
-
Those sorts of things are irrational to me.—
CBS News,
CBS News,
15 Feb. 2026
-
Although atheism is often associated with hyperrationality, this form of it is unapologetically irrational.—
Christopher Beha,
New Yorker,
14 Feb. 2026
Adjective
-
Embracing these ideas wholeheartedly, Yoshida’s borderline psychotic reimagining of the tale is both highly symbolic and totally riveting.—
Bilge Ebiri,
Vulture,
16 Feb. 2026
-
While Hadari is rebranding as YH Studios, his creative voice remains unchanged, clearly influenced by Browne in his fusion of the sartorial with the slightly psychotic.—
Ari Stark,
Footwear News,
11 Feb. 2026
Adjective
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Asked about now-unavailable data and information, a spokesman for Kennedy said the premise of the Associated Press’ inquiry was flawed and relied on selective and inaccurate characterizations.—
Mike Stobbe,
Los Angeles Times,
18 Feb. 2026
-
Heathcliff, too, benefits from some delightfully inaccurate outfitting.—
Madeline Hirsch,
InStyle,
17 Feb. 2026
Cite this Entry
“Unsound.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unsound. Accessed 24 Feb. 2026.
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