Where does “quinzena” come from?

quinzena (Portuguese) comes from Portuguese quinze, from Old Portuguese quinze, from Latin quindecim, from Latin decem, from Latin -nus, from Proto-Italic -nos, from Proto-Indo-European -nós — Creates verbal adjectives from roots.

quinzena (Portuguese): A period of fifteen consecutive days

Definitions

A period of fifteen consecutive days

Ancestry of “quinzena”, step by step

Step	Language	Word	Meaning
1	Portuguese	quinze	fifteen
2	Old Portuguese	quinze	—
3	Latin	quindecim	fifteen; 15
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

Words derived from “quinzena”

quinzenal
quinzenalmente

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