Where does “intersyndical” come from?

intersyndical (French) comes from French syndical, from French syndic, from Late Latin syndicus, from Ancient Greek σύνδικος, from Ancient Greek σῠν-, from Ancient Greek σύν, from Proto-Hellenic *ksún — beside, with.

intersyndical (French): interunion

Definitions

interunion

Ancestry of “intersyndical”, step by step

Step	Language	Word	Meaning
1	French	syndical	syndical
2	French	syndic	a syndic
3	Late Latin	syndicus	representative of a corporation or town, syndic;...
4	Ancient Greek	σύνδικος	advocate of a defendant; advocate for a...
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 →