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
Relevance
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
Firefighters went to the pier, which was closed in late 2024 after it was deemed structurally unsound, and found a section smoldering underneath.
—
David Hernandez, San Francisco Chronicle, 1 Mar. 2026
Analysts and economists responded throughout the week that the economics implied by Citrini’s argument were unsound, but on Thursday, Twitter co-founder and current Block CEO Jack Dorsey stunned the market by announcing a massive 40% downsizing of his company’s ranks.
—Nick Lichtenberg, Fortune, 28 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
See All Example Sentences for unsound
David Hernandez, San Francisco Chronicle, 1 Mar. 2026
Analysts and economists responded throughout the week that the economics implied by Citrini’s argument were unsound, but on Thursday, Twitter co-founder and current Block CEO Jack Dorsey stunned the market by announcing a massive 40% downsizing of his company’s ranks.
—Nick Lichtenberg, Fortune, 28 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
See All Example Sentences for unsound
Recent Examples of Synonyms for unsound
Adjective
-
This animal is really, really very, very, very sick.—
ABC News,
ABC News,
20 Apr. 2026
-
Cameron Collins was sick of Joe Biden.—
Los Angeles Times,
Los Angeles Times,
20 Apr. 2026
Adjective
-
Indeed, because deportation is not considered a criminal matter, the constitutional provisions protecting those accused and convicted of crimes do not apply, including prohibiting unreasonable searches and seizures, providing a lawyer and requiring a jury trial.—
Erwin Chemerinsky,
Twin Cities,
8 Apr. 2026
-
That has prompted constitutional concerns around the Fourth Amendment, which prevents unreasonable search and seizure.—
Lisa Hagen,
Hartford Courant,
7 Apr. 2026
Adjective
-
In an insane society, this is a project of years, not weeks.—
Literary Hub,
Literary Hub,
15 Apr. 2026
-
If jurors do decide that Fahim was insane at the time of the killings, he would likely be sent to a state hospital for mental health treatment.—
Sean Emery,
Oc Register,
14 Apr. 2026
Adjective
-
This story has been updated to remove erroneous information on funding for the Boulevard Green project and to correct details on the trip to Dallas.—
Olivia Wakim,
AJC.com,
17 Apr. 2026
-
American Express is pledging to protect users from erroneous transactions made by agents that are registered with Amex.—
Jack Kubinec,
Fortune,
14 Apr. 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
-
Letting Jinx stay is yet another act of irrational love from Margo.—
Erin Qualey,
Vulture,
15 Apr. 2026
-
That resistance is not irrational.—
Nick Lichtenberg,
Fortune,
15 Apr. 2026
Adjective
-
Philip Seymour Hoffman played him on Broadway as a near-psychotic, his philandering very much to blame for the fall of his elder son, Biff.—
Chris Jones,
New York Daily News,
10 Apr. 2026
-
Less commonly, some people experience psychotic symptoms, suicidal thoughts, anxiety, paranoia, confusion or emotional distress.—
Hollis Karoly,
The Conversation,
9 Apr. 2026
Adjective
-
Perhaps most significantly, 36 percent of consumers have already returned products because of inaccurate or inconsistent information provided during the digital journey.—
Arthur Zaczkiewicz,
Footwear News,
20 Apr. 2026
-
An earlier version of this recap included an inaccurate scene description; it has been corrected.—
Erin Qualey,
Vulture,
20 Apr. 2026
Cite this Entry
“Unsound.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unsound. Accessed 24 Apr. 2026.
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