Where does “tertio” come from?
tertio (Latin) comes from Latin tertius, from Latin trēs, from Proto-Italic trēs, from Proto-Indo-European *tréyes.
Ancestry of “tertio”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Latin | tertius | third, the ordinal number after secundus and... |
| 2 | Latin | trēs | — |
| 3 | Proto-Italic | trēs | three |
| 4 | Proto-Indo-European | *tréyes | — |