Because September used to be the seventh month of the old Roman calendar. In Latin, septimus means "seventh".
Sept or hept
September. it uses the prefix 'Sept,' Latin for seven, as it was at one point the seventh month in the year. And Septagon is not a word in the English language. The correct name for a 7-sided polygon is "heptagon." It is derived from "hepta," the Greek word for "seven."
"ian' is not a prefix. A prefix is at the start of a word.
No, a prefix is a word that goes on the start of a word e.g. pre- in preschool
sept is the Latin word for seven and September was seventh in the Latin calendar
I think it is a word root, not a prefix.
"Second-hand" is a word that starts with the prefix "se-".
Oh, dude, the prefix of "septic" is "sept." It's like the cool, shortened version of "septic," you know? So, if you're ever playing Scrabble and need to drop some knowledge, just drop that "sept" bomb on them.
7 is spelled 'sept' in French. You find it into the noun 'september' ('septembre' in French) because long ago, the year started on the first of March, so September was the seventh month of the year.
prefix
terrain
A prefix