Where does “σέντζα” come from?

σέντζα (Greek) comes from Italian senza, from Latin sine, from Proto-Indo-European swé — self.

Ancestry of “σέντζα”, step by step

Step	Language	Word	Meaning
1	Italian	senza	without; without, -less; coxless
2	Latin	sine	without; second-person singular present active...
3	Proto-Indo-European	swé	self