quarter-century

The term "quarter-century" is a transparent English compound formed by combining two well-established units of measurement. "Century" originates from the Latin centum, meaning "one hundred," and came to denote a period of one hundred years. "Quarter," derived from the Latin quartus meaning "fourth," signifies one of four equal parts. The compound's logic is purely mathematical: a quarter (one fourth) of a century (one hundred years) equals twenty-five years. This modern, logical formation reflects the English language's tendency to create precise, self-explanatory terms for specific durations by combining existing lexical elements.

Structure: quarter (one fourth) + century (one hundred years) quarter: From Latin quartarius (a fourth part), via Old French quartier. In this compound, it functions as a numerical prefix meaning "one fourth of". century: From Latin centuria (a group of one hundred, a century), from centum (one hundred). In this compound, it functions as the base noun denoting the unit of time.