old-age

The compound "old-age" is a straightforward combination of two native English words, both with deep Germanic and Latinate lineages. "Old" descends from the Proto-Germanic aldaz, related to concepts of growth and adulthood, while "age" entered English via French from the Latin aetas, denoting a span of time. Literally meaning "the age of being old," the term evolved from a simple descriptive phrase into a fixed compound adjective. It now specifically characterizes the later stage of human life and anything pertaining to it, reflecting a societal categorization of life phases.

Structure: old (aged) + age (period of life) old: From Old English eald, meaning "aged, ancient, mature." It is a Germanic root. age: From Old French aage, eage, ultimately from Latin aetāticum, meaning "period of life, lifetime." It functions as a noun.