unsound

1. Not in good condition;
   Damaged or decayed (synset 302283378)
   "an unsound foundation"
   similar to:

   • corroded - eaten away as by acid or oxidation
   • decayed, rotted, rotten - damaged by decay; hence unsound and useless
2. Not sound financially (synset 302282002)
   "unsound banking practices"
   also:

   • broken - physically and forcibly separated into pieces or cracked or split
   • damaged - harmed or injured or spoiled
   • unfit - not in good physical or mental condition; out of condition
   • unhealthy - not in or exhibiting good health in body or mind
   • injured - harmed
   • unwholesome - detrimental to physical or moral well-being
   similar to:

   • bad, high-risk, risky, speculative - not financially safe or secure
   • long - involving substantial risk
   • wildcat - outside the bounds of legitimate or ethical business practices
3. Containing or based on a fallacy (synset 302510010)
   "fallacious reasoning"; "an unsound argument"
   similar to: invalid - having no cogency or legal force
   same as: fallacious
4. Suffering from severe mental illness (synset 302083947)
   "of unsound mind"
   similar to: insane - afflicted with or characteristic of mental derangement
   same as: mentally ill, unstable
5. Physically unsound or diseased (synset 301177766)
   "has a bad back"; "a bad heart"; "bad teeth"; "an unsound limb"; "unsound teeth"
   similar to: unhealthy - not in or exhibiting good health in body or mind
   same as: bad, unfit
6. Of e.g. advice (synset 300729148)
   similar to: undependable, unreliable - not worthy of reliance or trust

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