Adjective

• S: (adj) unsound (not in good condition; damaged or decayed) "an unsound foundation"
• S: (adj) unsound (not sound financially) "unsound banking practices"
• see also
• similar to
• S: (adj) bad, risky, high-risk, speculative (not financially safe or secure) "a bad investment"; "high risk investments"; "anything that promises to pay too much can't help being risky"; "speculative business enterprises"
• S: (adj) long (involving substantial risk) "long odds"
• S: (adj) wildcat (outside the bounds of legitimate or ethical business practices) "wildcat currency issued by irresponsible banks"; "wildcat stock speculation"; "a wildcat airline"; "wildcat life insurance schemes"
• antonym
• W: (adj) sound [Opposed to: unsound] (financially secure and safe) "sound investments"; "a sound economy"
• derivationally related form
• S: (adj) fallacious, unsound (containing or based on a fallacy) "fallacious reasoning"; "an unsound argument"
• S: (adj) mentally ill, unsound, unstable (suffering from severe mental illness) "of unsound mind"
• S: (adj) bad, unfit, unsound (physically unsound or diseased) "has a bad back"; "a bad heart"; "bad teeth"; "an unsound limb"; "unsound teeth"
• similar to
• derivationally related form
• antonym
• W: (adj) healthy [Indirect via unhealthy] (having or indicating good health in body or mind; free from infirmity or disease) "a rosy healthy baby"; "staying fit and healthy"
• S: (adj) unsound (of e.g. advice)