Where does “synonyme” come from?

synonyme (English) comes from English synonym, from Middle English sinonyme, from Latin synōnymum, from Ancient Greek συνώνυμος, from Ancient Greek σῠν-, from Ancient Greek σύν, from Proto-Hellenic *ksún — beside, with.

synonyme (English): Obsolete form of synonym

Definitions

Obsolete form of synonym

Ancestry of “synonyme”, step by step

Step	Language	Word	Meaning
1	English	synonym	A word whose meaning is the same as that of...
2	Middle English	sinonyme	—
3	Latin	synōnymum	synonym
4	Ancient Greek	συνώνυμος	Having the same name; Having only one meaning:...
5	Ancient Greek	σῠν-	together; with, together
6	Ancient Greek	σύν	beside, with
7	Proto-Hellenic	*ksún	beside, with

Every word from Proto-Hellenic *ksún →Every word from Ancient Greek σῠν- →Every word from Ancient Greek σύν →