A state of severe confusion and mental disorder, often caused by a serious medical condition or intoxication.

गंभीर उन्माद

English Usage: After the accident, he lapsed into grave delirium, not recognizing his family.

Hindi Usage: दुर्घटना के बाद, वह गंभीर उन्माद में चला गया, अपने परिवार को पहचान नहीं पा रहा था।