hundred-year

The compound adjective "hundred-year" is a transparent modern English formation, directly combining two native Germanic elements. "Hundred" originates from the Old English hundrēd, a term for the number 100, which itself is a compound of a base meaning "ten" and a term related to "count." "Year" derives from the Old English gēar, referring to the cycle of seasons. The logic of the compound is purely descriptive, linking the quantity "one hundred" with the unit of time "year" to create a modifier for anything pertaining to a century-long duration. This analytical construction follows a common English pattern for forming precise temporal adjectives, such as "ten-day" or "five-minute."

Structure: hundred (number) + year (time period) - hundred: From Old English hundrēd, of Germanic origin; related to Dutch honderd and German hundert. Functions as a numeral root. - year: From Old English gēar, of Germanic origin; related to Dutch jaar and German Jahr. Functions as a noun root denoting a time period.