[adj] in deplorable condition; "a street of bedraggled tenements"; "a broken-down fence"; "a ramshackle old pier"; "a tumble-down shack"
[adj] of e.g. advice
[adj] physically unsound or diseased; "has a bad back"; "a bad heart"; "bad teeth"; "an unsound limb"; "unsound teeth"
[adj] suffering from severe mental illness; "of unsound mind"
[adj] not sound financially; "unsound banking practices"
[adj] not in good condition; damaged or decayed; "an unsound foundation"
[adj] containing or based on a fallacy; "fallacious reasoning"; "an unsound argument"
bad, bedraggled, broken-down, corroded, damaged, decayed, dilapidated, fallacious, high-risk, insane, insecure, invalid, long, mentally ill, ramshackle, risky, rotted, rotten, speculative, tatterdemalion, tumble-down, undependable, unfit, unhealthy, unrel