/dɪˈmaɪz/
the end of something that was previously considered to be powerful, such as a business, industry, or system:
The demise of the company was sudden and unexpected.
(formal or humorous) death 死亡；逝世；一命呜呼
his imminent/sudden/sad demise
他死到临头；他的猝死；他悲惨的死亡