老ろう死し

ろ

う

し

Meanings

1

noun, noun or participle which takes 'suru', intransitive verb

dying of old age; death from old age

Refers to a natural death due to advanced age, without specific illness. Often used in formal or medical contexts.

自し然ぜん死し
自然死 is a broader term for 'natural death', which can include death from illness, while 老死 specifically means death solely due to old age.
老ろう衰すい
老衰 is a medical term for 'senility' or 'debility due to old age', often used as a cause of death. 老死 focuses on the event of dying from old age.

Compound of 老 (old age) and 死 (death). The exact historical derivation is uncertain, but the meaning is transparent from its components.