Where does “seizièmement” come from?

seizièmement (French) comes from French seizième, from French seize, from Middle French seze, from Old French seize, from Latin sedecim, from Latin decem, from Latin -nus, from Proto-Italic -nos — Creates verbal adjectives from roots.

seizièmement (French): sixteenthly

Definitions

sixteenthly

Ancestry of “seizièmement”, step by step

Step	Language	Word	Meaning
1	French	seizième	sixteenth
2	French	seize	sixteen
3	Middle French	seze	sixteen
4	Old French	seize	—
5	Latin	sedecim	sixteen; 16
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 →