Where does “quadruplex” come from?
quadruplex (French) comes from Latin quadruplex, 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.
Ancestry of “quadruplex”, step by step
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | Latin | quadruplex | fourfold, quadruple; a fourfold amount |
| 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 |