Where does “dieciseis” come from?

dieciseis (Chavacano) comes from Spanish dieciséis, from Old Spanish dizeseis, from Latin sedecim, from Latin decem, from Latin -nus, from Proto-Italic -nos, from Proto-Indo-European -nós — Creates verbal adjectives from roots.

dieciseis (Chavacano): sixteen

Definitions

sixteen

Ancestry of “dieciseis”, step by step

Step	Language	Word	Meaning
1	Spanish	dieciséis	sixteen
2	Old Spanish	dizeseis	—
3	Latin	sedecim	sixteen; 16
4	Latin	decem	ten; 10
5	Latin	-nus	-an
6	Proto-Italic	-nos	Creates verbal adjectives from verb stems
7	Proto-Indo-European	-nós	Creates verbal adjectives from roots

Every word from Proto-Indo-European -nós →Every word from Latin -nus →Every word from Latin decem →