Where does “terciário” come from?

terciário (Portuguese) comes from Latin tertiārius, from Latin tertius, from Latin trēs, from Proto-Italic trēs, from Proto-Indo-European *tréyes.

terciário (Portuguese): tertiary

Definitions

  1. tertiary

Ancestry of “terciário”, step by step

StepLanguageWordMeaning
1Latintertiāriuscontaining a third part
2Latintertiusthird, the ordinal number after secundus and...
3Latintrēsthree; 3
4Proto-Italictrēsthree
5Proto-Indo-European*tréyes—
Every word from Proto-Indo-European *tréyes →Every word from Proto-Italic trēs →Every word from Latin trēs →