delirium
n.a state of being very confused and having strange thoughts, often because of a high fever or a serious illness. You might feel like you are seeing things that are not there.
n.a state of mental confusion characterized by incoherent speech and hallucinations, typically resulting from a high fever or severe illness. Often used to describe a temporary loss of mental clarity.
“The patient suffered from delirium after the surgery.”
“Doctors monitored the patient closely for signs of delirium, as high fevers can cause severe confusion in the elderly.”
“The sudden onset of delirium often signals a systemic infection or metabolic imbalance, requiring immediate intervention to prevent further neurological damage.”
“In excessive doses it can cause confusion or even delirium.”
Borrowed from Latin dēlīrium (“derangement, madness”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.