unsound

adjectives

not in good condition; damaged or decayed
"an unsound foundation"
is derived from
antonym
is similar to
eaten away as by acid or oxidation
is similar to
damaged by decay; hence unsound and useless
"rotten floor boards"; "rotted beams"; "a decayed foundation"
not sound financially
"unsound banking practices"
is derived from
antonym
is similar to
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"
is similar to
involving substantial risk
"long odds"
is similar to
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"
see also
physically and forcibly separated into pieces or cracked or split
"a broken mirror"; "a broken tooth"; "a broken leg"; "his neck is broken"
see also
harmed or injured or spoiled
"I won't buy damaged goods"; "the storm left a wake of badly damaged buildings"
see also
not in good physical or mental condition; out of condition
"fat and very unfit"; "certified as unfit for army service"; "drunk and unfit for service"
see also
not in or exhibiting good health in body or mind
"unhealthy ulcers"
see also
harmed
"injured soldiers"; "injured feelings"
see also
detrimental to physical or moral well-being
"unwholesome food"; "unwholesome habits like smoking"
containing or based on a fallacy
"fallacious reasoning"; "an unsound argument"
is derived from
suffering from severe mental illness
"of unsound mind"
is derived from
physically unsound or diseased
"has a bad back"; "a bad heart"; "bad teeth"; "an unsound limb"; "unsound teeth"
is derived from
of e.g. advice
is similar to
not worthy of reliance or trust
"in the early 1950s computers were large and expensive and unreliable"; "an undependable assistant"