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unsound

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(un so̵und′)

adjective

not sound or free from defect; specif.,

not normal or healthy physically or mentally
not safe, firm, or solid; insecure
not safe and secure financially
not based on truth or valid reasoning; not accurate, reliable, sensible, etc.
light: said of sleep

Related Forms:

unsoundly adverb
unsoundness noun

See unsound in American Heritage Dictionary 4

adjective un·sound·er, un·sound·est

Not dependably strong or solid.
Not physically or mentally healthy.
Not true or logically valid; fallacious: an unsound conclusion.

Related Forms:

un·soundˈly adverb

un·soundˈness noun

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