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Synonyms

unsound

American  
[uhn-sound] / ʌnˈsaʊnd /

adjective

unsounder, unsoundest
  1. not sound; unhealthy, diseased, or disordered, as the body or mind.

    Synonyms:
    unhealthy, ill, sick, infirm
  2. decayed or impaired, as timber or foods; defective.

    Synonyms:
    unwholesome, rotten
  3. not solid or firm, as foundations.

  4. not well-founded or valid; fallacious.

    an unsound argument.

    Synonyms:
    faulty, erroneous, false
  5. easily broken; light.

    unsound slumber.

  6. not financially strong; unreliable.

    an unsound corporation.


unsound British  
/ ʌnˈsaʊnd /

adjective

  1. diseased, weak, or unstable

    of unsound mind

  2. unreliable or fallacious

    unsound advice

  3. lacking solidity, strength, or firmness

    unsound foundations

  4. of doubtful financial or commercial viability

    an unsound enterprise

  5. (of fruit, timber, etc) not in an edible or usable condition

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of unsound

Middle English word dating back to 1275–1325; see origin at un- 1, sound 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Unsound or dishonest research that relies on “p-hacking” will merely need a wider search to locate the magical results that meet the test of statistical significance.

From Scientific American • Nov. 1, 2017

The festival includes the only North American performances of the National Theater of Scotland’s trilogy of “The James Plays”; the immersive “Situation Rooms” of the Berlin theater group Rimini Protokoll; and the thunderous Unsound Festival.

From New York Times • Jun. 12, 2016

The peak of my live music year, as it was in 2014, took place thousands of miles away from Los Angeles at the Unsound festival in Kraków.

From Los Angeles Times • Dec. 19, 2015

A producer and composer who works under the name of Count previewed a documentary, "Unsound," that portrayed the frustrations of five groups or artists struggling with the new rules of the music economy.

From Chicago Tribune • Oct. 29, 2013

Unsound Objection A man applied for a position in a bank.

From Certain Success by Hawkins, Norval A.