sixth-century

The compound "sixth-century" is a modern English formation that combines a Germanic ordinal number with a Latin-derived time unit. "Sixth" originates from the Proto-Indo-European root s(w)eks, meaning "six," which evolved through Proto-Germanic into Old English. "Century" derives from the Latin centum, a well-attested PIE root for "hundred," which entered English via French. The logic of the compound is straightforwardly chronological, using the ordinal system to designate the sixth block of one hundred years in the Common Era calendar. Its modern abstract meaning is purely historical and referential, pinpointing a specific hundred-year period in human history.

Structure: sixth (ordinal number) + century (period of 100 years) sixth: From Old English siexta, from Proto-Germanic sehistô, related to the number six. Functions as an ordinal number specifying position in a sequence. century: From Latin centuria (a group of one hundred, a division of a Roman legion), from centum (hundred). Functions as a noun denoting a period of one hundred years.