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Delirium

/dɪˈlɪriəm/
C1
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(noun) A temporary mental state with a sudden onset, usually reversible, including symptoms of confusion, inability to concentrate, disorientation, anxiety, and sometimes hallucinations. Causes can include dehydration, drug intoxication, and severe infection.

Delirium of one person is called madness. Delirium of thousands of people is called religion.
We don't help racists promote their delirium caused by ignorance and stupidity.
CEFR Practice Quiz
The high fever caused the patient to fall into a state of ____.

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