老化 (lǎo huà): (ofคนหนึ่ง

This refrigerator has been used for nearly twenty years, and its wiring is badly aged and often leaks electricity, so we had no choice but to replace it with a new one.

The elevator in the residential complex is aging, so it always makes a loud noise when running; the property management decided to thoroughly overhaul it next month.

Grandpa is getting older, and his skin ages quickly; even a slight bump easily causes bruises, so the family doesn't let him do heavy work.

Scientists have found that staying up late for a long time can accelerate brain aging and increase the risk of Alzheimer's disease, so they recommend that everyone maintain a regular sleep schedule.

The aging of urban infrastructure is a big problem; many water pipes have been used for fifty years and often burst, forcing the government to invest huge sums in renovation.