Where does “ventottenne” come from?

ventottenne (Italian) comes from Italian ventotto, from Italian venti, from Late Latin vĭnti, from Latin vīgintī, from Latin quīnque, from Proto-Italic kʷenkʷe, from Proto-Indo-European pénkʷe — five.

ventottenne (Italian): twenty-eight-year-old

Definitions

twenty-eight-year-old

Ancestry of “ventottenne”, step by step

Step	Language	Word	Meaning
1	Italian	ventotto	twenty-eight
2	Italian	venti	twenty; plural of vento
3	Late Latin	vĭnti	—
4	Latin	vīgintī	twenty
5	Latin	quīnque	five; 5
6	Proto-Italic	kʷenkʷe	five
7	Proto-Indo-European	pénkʷe	five

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