Where does “douzièmement” come from?

douzièmement (French) comes from French douzième, from French douze, from Old French doze, from Vulgar Latin dodeci, from Latin duodecim, from Latin decem, from Latin -nus, from Proto-Italic -nos — Creates verbal adjectives from roots.

douzièmement (French): twelfthly

Definitions

twelfthly

Ancestry of “douzièmement”, step by step

Step	Language	Word	Meaning
1	French	douzième	twelfth
2	French	douze	twelve
3	Old French	doze	twelve
4	Vulgar Latin	dodeci	—
5	Latin	duodecim	twelve; 12; dozen
6	Latin	decem	ten; 10
7	Latin	-nus	-an
8	Proto-Italic	-nos	Creates verbal adjectives from verb stems
9	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 →