老衰 ろうすい
rōsui

Noun
Suru Verb
no-Adjective

1. senility; senile decay; infirmity (through age)

Intransitive
かれ老衰 ろうすい ねん まえ くなった。
karewa rōsuide ninen maeni nakunatta.
He died of old age two years ago.