Where does “quatro” come from?

quatro (Old Leonese) comes from Latin quattŭor, from Portuguese quarto, from Old Portuguese quarto, from Latin quārtus, from Proto-Indo-European kʷeturtos, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.

quatro (Old Leonese): four

Definitions

four

Ancestry of “quatro”, step by step

Step	Language	Word	Meaning
1	Latin	quattŭor	four; 4
2	Portuguese	quarto	ordinal form of quatro; fourth; quarter; fourth;...
3	Old Portuguese	quarto	quarter
4	Latin	quārtus	fourth
5	Proto-Indo-European	kʷeturtos	—
6	Proto-Indo-European	kʷetwóres	four
7	Proto-Indo-European	kʷe-	and

Words derived from “quatro”

quatro

Every word from Proto-Indo-European kʷe- →Every word from Proto-Indo-European kʷetwóres →Every word from Proto-Indo-European kʷeturtos →