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
What is deeply concerning is that the District Attorney is choosing to proceed on a case that is fundamentally unsound and cannot be proven at trial.
—
Jennifer Watts, ABC News, 6 Feb. 2026
Colton was wrong, but his process wasn’t altogether unsound.
—Joe Reid, Vulture, 16 Jan. 2026
The Badgers ran for 209 yards and three scores against the Illini, while an unsound Gophers defense gave up 220 and two TDs to the Wildcats.
—Andy Greder, Twin Cities, 28 Nov. 2025
But on closer look, the table also shows that any such relationship disappears at higher doses of aluminum—a quirky finding that should make the whole idea appear unsound.
—Benjamin Mazer, The Atlantic, 21 Nov. 2025
See All Example Sentences for unsound
Jennifer Watts, ABC News, 6 Feb. 2026
Colton was wrong, but his process wasn’t altogether unsound.
—Joe Reid, Vulture, 16 Jan. 2026
The Badgers ran for 209 yards and three scores against the Illini, while an unsound Gophers defense gave up 220 and two TDs to the Wildcats.
—Andy Greder, Twin Cities, 28 Nov. 2025
But on closer look, the table also shows that any such relationship disappears at higher doses of aluminum—a quirky finding that should make the whole idea appear unsound.
—Benjamin Mazer, The Atlantic, 21 Nov. 2025
See All Example Sentences for unsound
Recent Examples of Synonyms for unsound
Adjective
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That leaves a sicker, older, more expensive pool of enrollees, which pushes up premiums for everyone.—
Max Klaver,
Miami Herald,
31 Mar. 2026
-
As a result, many began calling in sick or quitting entirely.—
Mary Walrath-Holdridge,
USA Today,
30 Mar. 2026
Adjective
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As in Williams’ case, attorneys argued that a sweep had violated the plaintiffs’ Fourth Amendment rights protecting them from unreasonable search and seizure, as well as their 14th Amendment right to due process.—
Ariane Lange,
Sacbee.com,
24 Mar. 2026
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Because that is ultimately what The Secret Garden is about—the stubborn, almost unreasonable insistence of living things to grow toward the light.—
Literary Hub,
Literary Hub,
23 Mar. 2026
Adjective
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This is not your $65,000-a-year job, someone who’s a janitor and is trying to talk in a school board meeting who really could lose his job for this opinion, which is insane.—
Ryan Morik,
FOXNews.com,
2 Apr. 2026
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Three years after Steven Yeun and Ali Wong captured the attention of viewers eager to see the culmination of their characters' insane road rage fight, the drama series is back, this time focusing on two couples with a new kind of beef.—
Madeleine Janz,
PEOPLE,
1 Apr. 2026
Adjective
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But those who in the nineteenth and twentieth centuries made erroneous predictions of imminent mass starvation erred by underestimating the world‑changing potential of grasses.—
Literary Hub,
Literary Hub,
25 Mar. 2026
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Complaints vary from inquiries sent through the website going unanswered and erroneous card charges to broken or ineffective merchandise.—
Dina Kaur,
AZCentral.com,
24 Mar. 2026
Adjective
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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
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There’s something both early American and midcentury modern in the design of these solid-oak vanities, which arrived just as everyone seems to have gotten over an irrational fear of brown furniture.—
Nicole Hoey,
Robb Report,
31 Mar. 2026
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The answer turned out to be four more years of sacrifice, struggle, and hope that must have felt, at times, completely irrational.—
Sharon McMahon,
Glamour,
25 Mar. 2026
Adjective
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The prescriptions for the anti-psychotic medications Nelson required twice daily were slow to be filled and forgotten on a desk in a corporate office.—
Teri Sforza,
Oc Register,
27 Mar. 2026
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After inheriting her childhood home, an unsuspecting woman becomes the object of her psychotic neighbor’s obsession, spiraling her down a violent path of stalking and possession that can only lead her to an extremely bloody Christmas.—
William Earl,
Variety,
25 Mar. 2026
Adjective
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However, the process still remains the critical weak point of modern-day aviation, as predictions rely heavily on subjective and often inaccurate pilot reports.—
Georgina Jedikovska,
Interesting Engineering,
31 Mar. 2026
-
To be sure, economic forecasts are often inaccurate.—
Max Zahn,
ABC News,
30 Mar. 2026
Cite this Entry
“Unsound.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unsound. Accessed 4 Apr. 2026.
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