Where does “quarto” come from?

quarto (Spanish) comes from Spanish cuarto, from Latin quārtus, from Proto-Indo-European kʷeturtos, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.

quarto (Spanish): Archaic form of cuarto

Definitions

Archaic form of cuarto

Ancestry of “quarto”, step by step

Step	Language	Word	Meaning
1	Spanish	cuarto	fourth; fourth in a series; quarter
2	Latin	quārtus	fourth
3	Proto-Indo-European	kʷeturtos	—
4	Proto-Indo-European	kʷetwóres	four
5	Proto-Indo-European	kʷe-	and

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