demented

• Sich extrem irrational oder wahnsinnig verhaltend; den Verstand verloren habend; auch: an einer Demenz leidend.

Behaving in a wildly irrational or insane manner, often as a result of severe mental illness or extreme emotional disturbance; completely lacking reason.

1. Clinically insaneC1formalmedical

   Suffering from a severe cognitive impairment or mental illness that causes irrational, often erratic behavior and a profound loss of reason.

   Klinisch unzurechnungsfähig

   • The patient's ___ state required constant supervision.
   • A ___ individual was found wandering the streets.
   • His ___ ramblings made no sense to the doctors.
   • The court ruled that the defendant was ___ and unfit for trial.
   • She feared the disease would leave her ___ in old age.

   Synonymecrazedderangedinsanelunaticmadmaniacalpsychoticunbalancedunhinged

   Antonymelucidrationalsane

2. Wildly irrational or foolishC1informal

   Displaying behavior or ideas that are extremely unreasonable, bizarre, or lacking in sound judgment, often used for emphasis outside a clinical setting.

   Völlig irrational

   • The plan was so ___ that no one took it seriously.
   • He let out a ___ laugh during the serious ceremony.
   • The pressure of the job nearly drove her ___.
   • It's a ___ idea to invest your entire savings in such a risky scheme.
   • The crowd's ___ screams filled the concert hall.

   Synonymeabsurdcrazedderangedfranticfrenziedidioticinsaneirrationalmadnonsensicalpreposterousunhingedwild

   Antonymerationalreasonablesanesensiblesound