Where does “synapsirako” come from?

synapsirako (Finnish) comes from Finnish synapsi, from Ancient Greek σύναψις, from Ancient Greek συνάπτω, from Ancient Greek σῠν-, from Ancient Greek σύν, from Proto-Hellenic *ksún — beside, with.

synapsirako (Finnish): synaptic cleft

Definitions

synaptic cleft

Ancestry of “synapsirako”, step by step

synapsirako traces back through two separate lines of ancestry.

via Finnish synapsi

Step	Language	Word	Meaning
1	Finnish	synapsi	synapse
2	Ancient Greek	σύναψις	contact; point or line of junction; union,...
3	Ancient Greek	συνάπτω	I join together, connect
4	Ancient Greek	σῠν-	together; with, together
5	Ancient Greek	σύν	beside, with
6	Proto-Hellenic	*ksún	beside, with

via Finnish rako

Step	Language	Word	Meaning
1	Finnish	rako	slit, slot; crack; chink
2	Proto-Finnic	rako	crack

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