unsound

• Décrit quelque chose qui est en mauvais état, qui n'est pas fondé sur des preuves fiables ou qui n'est pas logiquement justifiable.

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.

   en mauvais état, avarié

   • 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.

   Synonymescorrodeddamageddecayeddiseasedfrailricketyrottenunhealthyunstableweakworn

   Antonymeshealthyintactsolidsoundsturdy

2. Financially weakB2formal

   Not financially stable or secure; risky or unreliable.

   financièrement fragile

   • 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.

   Synonymesinsecureprecariousriskyshakyunreliableunstableweak

   Antonymessafesecuresolidsoundstablestrong

3. Based on fallacyC1formal

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

   Non fondé (sur un raisonnement erroné)

   • 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.

   Synonymeserroneousfallaciousfalsefaultyflawedillogicalinvalidspeciousspuriousuntenable

   Antonymescogentlogicalreasonedsoundvalid

4. Mentally illC1formal

   Suffering from severe mental illness or instability.

   Mentalement instable

   • 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.

   Synonymescrazeddementedderangeddisturbedinsanemadmentally illunbalancedunhinged

   Antonymeshealthyrationalsanesoundstable

5. Physically diseasedB2formal

   Physically unsound or diseased; not healthy.

   maladif

   • 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.

   Synonymesailingdiseasedinfirmsicklyunhealthyunwell

   Antonymeshealthysoundwell

6. Unreliable adviceB2formal

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

   Conseil peu fiable

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

   Synonymesdubiousfallaciousflawedflimsyinvalidquestionableshakysuspectunfoundedunreliableuntenable

   Antonymesreliablesoundtrustworthyvalid