Where does “sinko” come from?

sinko (Ladino) comes from Old Spanish çinco, from Vulgar Latin cinque, from Latin quīnque, from Proto-Italic kʷenkʷe, from Proto-Indo-European pénkʷe — five.

sinko (Ladino): five

Definitions

five

Ancestry of “sinko”, step by step

Step	Language	Word	Meaning
1	Old Spanish	çinco	—
2	Vulgar Latin	cinque	five
3	Latin	quīnque	five; 5
4	Proto-Italic	kʷenkʷe	five
5	Proto-Indo-European	pénkʷe	five

Every word from Proto-Indo-European pénkʷe →Every word from Proto-Italic kʷenkʷe →Every word from Latin quīnque →