delirium

noun/dɪˈlɪriəm/

Frequency rank: #13,553 most common English word

Meaning

a state of mental confusion, excitement, or hallucination, often caused by illness or fever.

Illustration for the English word “delirium”

Example sentence

After three days without sleep, he fell into delirium and could not recognize his own family.

Synonyms & related words

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