Where does “cinquaginta” come from?

cinquaginta (Latin) comes from Latin quinquaginta, from Proto-Indo-European penkʷēḱomt, from Proto-Indo-European *pénkʷedḱomt.

cinquaginta (Latin): fifty

Definitions

Step	Language	Word	Meaning
1	Latin	quinquaginta	fifty; 50
2	Proto-Indo-European	penkʷēḱomt	—
3	Proto-Indo-European	*pénkʷedḱomt	—

cinquaginta — Etymology, Origin & Word History | Etymology Explorer