'Unsoundness' definitions:

Definition of 'unsoundness'

(from WordNet)
noun
A condition of damage or decay [ant: soundness]
noun
A misconception that is fallacious and not true or valid; "the unsoundness of his conclusion was obvious"
noun
Not mentally or physically healthy; "no one can be a poet without a certain unsoundness of mind" [ant: firmness, soundness, wisdom, wiseness]

Definition of 'Unsoundness'

From: GCIDE
  • Unsound \Un*sound"\, a. Not sound; not whole; not solid; defective; infirm; diseased. [1913 Webster] -- {Un*sound"ly}, adv. -- {Un*sound"ness}, n. [1913 Webster]

Words containing 'Unsoundness'