Where does “sinaptic” come from?

sinaptic (Romanian) comes from French synaptique, from French synapse, from Ancient Greek σύναψις, from Ancient Greek συνάπτω, from Ancient Greek σῠν-, from Ancient Greek σύν, from Proto-Hellenic *ksún — beside, with.

sinaptic (Romanian): synaptic

Definitions

synaptic

Ancestry of “sinaptic”, step by step

Step	Language	Word	Meaning
1	French	synaptique	synaptic
2	French	synapse	synapse
3	Ancient Greek	σύναψις	contact; point or line of junction; union,...
4	Ancient Greek	συνάπτω	I join together, connect
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 →