child (esp. a boy); viscount; founder of a school of thought (esp. Confucius); master; masters and philosophers (categorization of Chinese classical literature); (arch.) you; -er (i.e. man who spends all his time doing...)
decreasing birthrate and aging population; aging population combined with the diminishing number of children; declining birthrate and a growing proportion of elderly people; dwindling birthrate and an aging population; low birthrate and longevity