sept
It probably is 'septennial' because sept means 7 and ennial means year
Multi
bi-ennial
The root word -ennial means yearly, i.e. annual. It is used in words such as biennial and perennial.
One hundred years.
"Septennial" is the prefix that means "seventh year."
No - June is the sixth month of the year. The seventh month is July.
Bi-annual = twice a year Bi-ennial = every two years
One seventh of a year !
You could be an extra, but maybe not as a seventh year, because in your seventh year at Hogwarts, you are more like 17 or 18, so you wouldn't look old enough, unless you are a really old looking 15 year old.
HARRY POTTER LEFT HOGWARTS IN HIS SEVENTH YEAR HE NEVER STARTED HIS SEVENTH YEAR EITHER!!!
no - the ninth