Etymology of the English word septennium
the English word
septenniumderived from the Latin word
septenniumderived from the Latin word
annus (year; age)
derived from the Proto-Indo-European root
*at-derived from the Latin word
septem (seven)
derived from the Proto-Indo-European root
*septmâ‚€Date
The earliest known usage of septennium in English dates from the 19th century.
