Where does “synchyse” come from?

synchyse (French) comes from English synchysis, from Ancient Greek σύγχυσις, from Ancient Greek σῠν-, from Ancient Greek σύν, from Proto-Hellenic *ksún — beside, with.

Ancestry of “synchyse”, step by step

Step	Language	Word	Meaning
1	English	synchysis	A complicated, interlocking word-order pattern in...
2	Ancient Greek	σύγχυσις	a mixing; confounding; disturbing
3	Ancient Greek	σῠν-	together; with, together
4	Ancient Greek	σύν	beside, with
5	Proto-Hellenic	*ksún	beside, with

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