Where does “سنة” come from?

سنة (Egyptian Arabic) comes from Arabic سَنَة, from Proto-Semitic šanat- — year.

سنة (Egyptian Arabic): year

Definitions

Step	Language	Word	Meaning
1	Arabic	سَنَة	year
2	Proto-Semitic	šanat-	year

سنة — Etymology, Origin & Word History | Etymology Explorer