unsound

[ uhn-sound ]
See synonyms for unsound on Thesaurus.com
adjective,un·sound·er, un·sound·est.
  1. not sound; unhealthy, diseased, or disordered, as the body or mind.

  2. decayed or impaired, as timber or foods; defective.

  1. not solid or firm, as foundations.

  2. not well-founded or valid; fallacious: an unsound argument.

  3. easily broken; light: unsound slumber.

  4. not financially strong; unreliable: an unsound corporation.

Origin of unsound

1
Middle English word dating back to 1275–1325; see origin at un-1, sound2

Other words for unsound

Other words from unsound

  • un·sound·ly, adverb
  • un·sound·ness, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use unsound in a sentence

British Dictionary definitions for unsound

unsound

/ (ʌnˈsaʊnd) /


adjective
  1. diseased, weak, or unstable: of unsound mind

  2. unreliable or fallacious: unsound advice

  1. lacking solidity, strength, or firmness: unsound foundations

  2. of doubtful financial or commercial viability: an unsound enterprise

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

Derived forms of unsound

  • unsoundly, adverb
  • unsoundness, noun

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