Where does “dyis” come from?

dyis (Norman) comes from Old French dis, from Latin decem, from Latin -nus, from Proto-Italic -nos, from Proto-Indo-European -nós — Creates verbal adjectives from roots.

dyis (Norman): ten

Definitions

Ancestry of “dyis”, step by step

Step	Language	Word	Meaning
1	Old French	dis	ten; inflection of dire: ## first/second-person...
2	Latin	decem	ten; 10
3	Latin	-nus	-an
4	Proto-Italic	-nos	Creates verbal adjectives from verb stems
5	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 →