century

The word 'century' has a direct and logical path from its ancient roots to its modern meaning. It derives from the Latin 'centuria', which originally referred to a group of one hundred men, particularly a division of the Roman army. This term itself was built from 'centum', the Proto-Indo-European root for 'hundred', which is remarkably stable across many languages (e.g., Greek 'hekaton', Old English 'hund'). Over time, the military association faded, and the core meaning of a collection of one hundred units was generalized. By the 16th century, it became specifically applied to periods of one hundred years, a usage that has become its primary definition in English.

Structure: cent (hundred) + ury (noun suffix denoting a collective or period) 'cent' originates from the Latin 'centum', meaning 'hundred'. 'ury' is a noun-forming suffix derived from Latin '-uria' or '-orium', indicating a condition, collective entity, or place.