Unsound Definition

ŭn-sound
unsoundest, unsounder
adjective
unsounder, unsoundest
Not dependably strong or solid.
American Heritage
Not sound or free from defect.
Webster's New World
Not physically or mentally healthy.
American Heritage
Not true or logically valid; fallacious.
An unsound conclusion.
American Heritage
In horse management an unsound horse is one suffering ill-health that affects its suitability for its intended work.
Wiktionary
Antonyms:

Other Word Forms of Unsound

Adjective

Base Form:
unsound
Comparative:
unsounder
Superlative:
unsoundest

Origin of Unsound

  • un- +"Ž sound.

    From Wiktionary

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unsound