Where does “sesanta” come from?

sesanta (Venetian) comes from Latin sexāgintā, from Proto-Indo-European sweḱsḱomt, from Proto-Indo-European swéḱs-dḱomt — six-ten.

sesanta (Venetian): sixty

Definitions

Step	Language	Word	Meaning
1	Latin	sexāgintā	—
2	Proto-Indo-European	sweḱsḱomt	—
3	Proto-Indo-European	swéḱs-dḱomt	six-ten

sesanta — Etymology, Origin & Word History | Etymology Explorer