Where does “quadrifonia” come from?

quadrifonia (Italian) comes from Italian quadr-, 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.

quadrifonia (Italian): quadraphony

Definitions

quadraphony

Ancestry of “quadrifonia”, step by step

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

Words derived from “quadrifonia”

quadrifonico

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