Question

"Word Formation in English: Interpreting the Meaning of Prefixes and Suffixes."

in the above article:

sept (em) ; seven, Semtember...

then, sept must be "nine" not seven... or the way you explain wrong.

thanks, and all the respects.

Answer 1

"September" was originally named as the seventh month, which is July nowadays. Julius Caesar and Agustus pushed two months that carry their names (July and August) between June and September. They did not change the name of September, but the idea of it being the seventh month was lost. October should be the eighth month, but it was pushed up also. "Octo" means 8th, but October is the 10th month.