unsound

adjective

ˌən-ˈsau̇nd How to pronounce unsound (audio)
Definition of unsoundnext
1
as in sick
temporarily suffering from a disorder of the body an unsound horse that will have to be disqualified from the race

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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

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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

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4
as in erroneous
not being in agreement with what is true an unsound and pernicious stereotype

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of unsound Because his stance on climate change conflicts with overwhelming scientific consensus, the president has removed climate information from federal websites, approved scientifically unsound reports that favor fossil fuels, and gutted key scientific agencies and boards. — Joseph Bonasia, The Orlando Sentinel, 15 May 2026 Denials based on unwritten or misapplied rules or standards, or perhaps on subjective personal preferences, would be on unsound standing. — Nicole R. Kurtz, Miami Herald, 7 May 2026 What becomes alarmingly evident through the key assumptions check is how many of the current responses expect a quick resolution of the conflict — a supposition that is unsound, or at least unsupported. — Judd Devermont, semafor.com, 27 Apr. 2026 The logic behind Liam Rosenior’s shift to a back five at Brighton & Hove Albion on Tuesday was not entirely unsound. — Conor O'Neill, New York Times, 22 Apr. 2026 See All Example Sentences for unsound
Recent Examples of Synonyms for unsound
  1. sick
  2. unreasonable
  3. insane
  4. erroneous
  5. poorly
  6. irrational
  7. psychotic
  8. inaccurate
Adjective
  • Some recalls, Eskin said, are made after companies’ routine testing catches a pathogen before anyone gets sick, while others involve outbreaks that are already underway and vary widely in size and severity.
    — Dian Zhang, USA Today, 28 Aug. 2026
  • Sanchez also ordered a meal from Taco Bell, but didn’t get sick.
    — Rebecca Johnson, Chicago Tribune, 28 Aug. 2026
Definition of sick
Adjective
  • Your expectations of your stepsons aren’t unreasonable at all.
    — R. Eric Thomas, Mercury News, 27 Aug. 2026
  • If the prosecution’s version of the evidence is reasonable and the defense’s is unreasonable, then that is not reasonable doubt.
    — Christine Pelisek, PEOPLE, 25 Aug. 2026
Definition of unreasonable
Adjective
  • Darby hit an insane Coffin Drop from a lighting rig, through the stage on Knight.
    — Alfred Konuwa, Forbes.com, 30 Aug. 2026
  • That base price of about $5,000 may sound insane to the average person but likely won’t hurt the pockets of the average Lamborghini customer.
    — Keenan Thompson, Freep.com, 27 Aug. 2026
Definition of insane
Adjective
  • The lawsuit alleges that South Dakota’s rollout of the proof-of-citizenship requirement has disqualified eligible voters over erroneous minutiae and failed to offer them a realistic shot at fixing problems with their registration application.
    — John Hult, States Newsroom, 28 Aug. 2026
  • Towers told ProPublica that the audit had reached erroneous conclusions, that the auditors did not give him the opportunity to fully defend his work and that the journal’s willingness to stand by the study is proof that his research is sound.
    — Amy Yurkanin, ProPublica, 24 Aug. 2026
Definition of erroneous
Adjective
  • 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
  • This involves having a poorly or non-functioning colon and is not usually reversible.
    — Dr. John De Jong, Boston Herald, 17 Aug. 2025
Definition of poorly
Adjective
  • But the question remained unsolved for polygons with irrational angles.
    — Sam Macdonald, Scientific American, 14 Aug. 2026
  • As a result, the argument goes, today's spending is irrational because the hardware would need to be replaced too frequently to generate an attractive return on investment, known as ROI.
    — , CNBC, 12 Aug. 2026
Definition of irrational
Adjective
  • Prosecutors, on the other hand, have attempted to prove that Clancy was not psychotic and that the killings were deliberate.
    — Liam Quinn, PEOPLE, 1 Sep. 2026
  • Mack testified last Friday and this past Monday that Clancy was not psychotic at the time of the killings and retained her capacity to understand right from wrong and control her behavior.
    — Nicki Brown, CNN Money, 28 Aug. 2026
Definition of psychotic
Adjective
  • Travelers can place too much trust in a confident but inaccurate answer.
    — Jeff Fromm, Forbes.com, 28 Aug. 2026
  • Viral posts outlining ways to find AI tool hacks are now commonplace, but this also means an increase in factually inaccurate claims that are seen by millions of people.
    — James Peckham, PC Magazine, 27 Aug. 2026
Definition of inaccurate

Browse Nearby Words

unsought
unsound
unsoundness
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Cite this Entry

“Unsound.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unsound. Accessed 5 Sep. 2026.

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