Old age; the process of growing old and the changes that come with aging.
誰にでも老いは訪れる。
Old age comes to everyone.
祖父の老いを感じて、介護について真剣に考え始めた。
Noticing my grandfather's aging, I began to seriously think about care.
老いに伴う病気を予防するために運動を続けている。
I keep exercising to prevent illnesses associated with aging.