Where does “dozein” come from?

dozein (Middle English) comes from Old French dozaine, from Old French doze, from Vulgar Latin dodeci, from Latin duodecim, from Latin decem, from Latin -nus, from Proto-Italic -nos, from Proto-Indo-European -nós — Creates verbal adjectives from roots.

Ancestry of “dozein”, step by step

Step	Language	Word	Meaning
1	Old French	dozaine	a group of twelve
2	Old French	doze	twelve
3	Vulgar Latin	dodeci	—
4	Latin	duodecim	twelve; 12; dozen
5	Latin	decem	ten; 10
6	Latin	-nus	-an
7	Proto-Italic	-nos	Creates verbal adjectives from verb stems
8	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 →