Where does “sinodus” come from?

sinodus (Latin) comes from Ancient Greek σύνοδος, from Ancient Greek σῠν-, from Ancient Greek σύν, from Proto-Hellenic *ksún — beside, with.

Ancestry of “sinodus”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	σύνοδος	assembly, meeting; political associations,...
2	Ancient Greek	σῠν-	together; with, together
3	Ancient Greek	σύν	beside, with
4	Proto-Hellenic	*ksún	beside, with