delirium
noun
an acutely disturbed state of mind that occurs in fever, intoxication, and other disorders and is characterized by restlessness, illusions, and incoherence of thought and speech:
〘医〙 (高熱などでうわごとや幻覚を伴う)譫妄（せんもう）症［状態］, 一時的精神錯乱
e.g. somewhere a patient shouted in delirium
e.g. she had fits of delirium.
wild excitement or ecstasy:
〖時にa ～〗 極度の興奮(状態), 狂乱, 有頂天
e.g. a chorus of delirium from the terrace.
ORIGIN
mid 16th century: from Latin, from delirare ‘deviate, be deranged’ (literally ‘deviate from the furrow’), from de- ‘away’ + lira ‘ridge between furrows’.