unsoundness

/ʌnˈsaʊndnəs/
noun
  1. The quality or state of being based on poor reasoning, weak evidence, or faulty logic.
    • Critics pointed out the unsoundness of the economic forecast.
    • The unsoundness of the theory was exposed by new research.
    • The judge noted the unsoundness of the defendant's argument.
  2. The condition of being physically weak, damaged, or not in good health.
    • The unsoundness of the building's structure required immediate repairs.
    • Years of poor diet led to the unsoundness of his teeth.
    • Veterinarians diagnosed the horse with a leg unsoundness.
  3. A lack of mental stability or reliability.
    • Her unsoundness of mind was evident in her erratic behavior.
    • The unsoundness of his judgment worried his family.
    • The court questioned the unsoundness of the witness's memory.
Antonyms
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