unsound

• 形容事物状况不佳、不牢固；或指论点、结论等缺乏可靠证据或逻辑依据，因而站不住脚。

Describes something that is not in good condition, not based on reliable evidence, or not logically valid.

1. Damaged or decayedB2formal

   Not in good physical condition; weakened, damaged, or decayed.

   损坏或腐烂的

   • The old bridge was deemed unsound and closed to traffic.
   • The building's foundation was unsound, requiring extensive repairs.
   • He rejected the timber because it was unsound and full of rot.

   同义词corrodeddamageddecayeddiseasedfrailricketyrottenunhealthyunstableweakworn

   反义词healthyintactsolidsoundsturdy

2. Financially weakB2formal

   Not financially stable or secure; risky or unreliable.

   财务不稳健

   • The company's unsound financial practices led to its bankruptcy.
   • Investors were warned about the unsound nature of the scheme.
   • The bank's unsound lending policies caused a crisis.

   同义词insecureprecariousriskyshakyunreliableunstableweak

   反义词safesecuresolidsoundstablestrong

3. Based on fallacyC1formal

   Containing or based on a fallacy; logically flawed or incorrect.

   不合理的

   • His argument was unsound because it relied on false assumptions.
   • The court rejected the unsound reasoning presented by the defense.
   • An unsound conclusion can lead to poor decision-making.

   同义词erroneousfallaciousfalsefaultyflawedillogicalinvalidspeciousspuriousuntenable

   反义词cogentlogicalreasonedsoundvalid

4. Mentally illC1formal

   Suffering from severe mental illness or instability.

   精神失常

   • The defendant was found to be of unsound mind and unfit for trial.
   • She was committed to a hospital after being declared unsound.
   • His unsound mental state made him a danger to himself.

   同义词crazeddementedderangeddisturbedinsanemadmentally illunbalancedunhinged

   反义词healthyrationalsanesoundstable

5. Physically diseasedB2formal

   Physically unsound or diseased; not healthy.

   有病的

   • The doctor declared his lungs unsound due to years of smoking.
   • The horse was unsound and could not race.
   • An unsound body often leads to an unsound mind.

   同义词ailingdiseasedinfirmsicklyunhealthyunwell

   反义词healthysoundwell

6. Unreliable adviceB2formal

   Of advice, not based on good judgment or facts; unreliable.

   不可靠的建议

   • He gave unsound advice that led to financial loss.
   • Following unsound medical advice can be dangerous.
   • The consultant's unsound recommendations were ignored.

   同义词dubiousfallaciousflawedflimsyinvalidquestionableshakysuspectunfoundedunreliableuntenable

   反义词reliablesoundtrustworthyvalid