Synonyms
- balmy
- barmy [chiefly British]
- bats
- batty
- bedlam
- bonkers
- brainsick
- bughouse [slang]
- certifiable
- crackbrained
- cracked
- crackers
- crackpot
- cranky [dialect]
- crazed
- crazy
- cuckoo
- daffy
- daft
- demented
- deranged
- fruity [slang]
- gaga
- haywire
- insane
- kooky
- kookie
- loco [slang]
- loony
- looney
- loony tunes
- looney tunes
- lunatic
- mad
- maniacal
- maniac
- mental
- meshuga
- meshugge
- meshugah
- meshuggah
- moonstruck
- non compos mentis
- nuts
- nutty
- psycho
- psychotic
- scatty [chiefly British]
- screwy
- unbalanced
- unhinged
- wacko
- whacko
- wacky
- whacky
- wud [chiefly Scottish]
Examples of unsound in a Sentence
The roof is structurally unsound.
disgruntled relatives tried to prove that the woman was of unsound mind when she made her will
Recent Examples on the Web
Malzahn was hired partly to bring stability to the program, but his decision-making, talent evaluation and personnel moves have been rash and unsound.
—
Mike Bianchi, Orlando Sentinel, 30 Nov. 2024
But under his watch, the Sox were a wildly unsound, undisciplined team that did almost nothing right.
—Jon Greenberg, The Athletic, 8 Aug. 2024
Dozens of complaints and subsequent health inspections were strikingly similar across the company’s properties in Denver and Aurora: black mold, pest infestations, unsound infrastructure.
—Joe Rubino, The Denver Post, 3 Nov. 2024
Eugenics was debunked as both biologically unsound and morally repugnant decades ago, but Donald Trump has repackaged its key lies to appeal to 21st-century American anxieties.
—Arthur Caplan, Scientific American, 17 Oct. 2024
See all Example Sentences for unsound 
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Mike Bianchi, Orlando Sentinel, 30 Nov. 2024
But under his watch, the Sox were a wildly unsound, undisciplined team that did almost nothing right.
—Jon Greenberg, The Athletic, 8 Aug. 2024
Dozens of complaints and subsequent health inspections were strikingly similar across the company’s properties in Denver and Aurora: black mold, pest infestations, unsound infrastructure.
—Joe Rubino, The Denver Post, 3 Nov. 2024
Eugenics was debunked as both biologically unsound and morally repugnant decades ago, but Donald Trump has repackaged its key lies to appeal to 21st-century American anxieties.
—Arthur Caplan, Scientific American, 17 Oct. 2024
See all Example Sentences for unsound
Dictionary Entries Near unsound
Cite this Entry
“Unsound.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unsound. Accessed 18 Dec. 2024.
Copy CitationKids Definition
unsound
adjective
un·sound
ˌən-ˈsau̇nd 
ˈən-
1
: not healthy or whole
an unsound horse
2
: not mentally normal : not wholly sane
of unsound mind
3
: not firmly made, placed, or fixed
an unsound structure
4
: not based on truth or logic
unsound arguments
unsoundness
noun
-ˈsau̇n(d)-nəs
Medical Definition
unsound
adjective
un·sound
-ˈsau̇nd
: not sound: as
a
: not healthy or whole
an unsound limb
an unsound horse
b
: not mentally normal : not wholly sane
of unsound mind
c
: not fit to be eaten
unsound food
unsoundness
noun
Legal Definition
unsound
adjective
un·sound
ˌən-ˈsau̇nd
: not sound: as
a
: not healthy or whole
b
: not mentally normal : not wholly sane
of unsound mind
c
: not firmly made, placed, or fixed
d
: not valid or true
an unsound argument
unsoundly
adverb
unsoundness
noun
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