(かれい)

かれい
noun
aging, getting older
formalmedicalhealth
1. aging, growing older
The natural process of getting older over time. Used especially in medical, health, and scientific contexts to describe age-related changes, as opposed to 老化(ろうか) which emphasizes deterioration.
Physical strength declines with aging.
I'm concerned about age-related changes in my skin.
Measures to prevent body odor from aging are gaining popularity.

A neutral, somewhat clinical term for aging. Compared to 老化(ろうか) (deterioration due to aging), 加齢(かれい) simply describes the passage of years without the negative connotation of decline. Frequently used in health and beauty product marketing.

Common collocations