"Senescing" Natural Recordings by Native Speakers
The term "senescing" refers to the process of growing old or deteriorating due to the wearing out or degeneration of cells, tissues, or organs, especially as a natural part of the aging process in living organisms.
Older people, typically those aged 65 or above, either in school (denoting students in the final year at high school) or in society, in general terms they are older people or people in higher grade.