Why this word is great
CENTENARY — [Adjective, Noun] An event, object, or period marking a hundred years; specifically, a 100th anniversary. From Latin centēnārius ("containing 100; official over a hundred"), from centēnī ("100 each") + -ārius ("-ary"), from centum ("hundred"). Unlike "century," which simply denotes the indifferent passage of a hundred years, or "centennial," its transatlantic counterpart for celebration, "centenary" carries the specific, ceremonial weight of a milestone reached—the marker, not the span. It is the chill of a brass plaque freshly mounted on a weathered cornerstone, the must of a commemorative album opened for the first time in decades, and the faint, metallic tang in the air from a town-square monument polished for the occasion. A word that measures not just time, but the human need to stand at its fixed points and look both ways.