Where does “terceiro” come from?

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

terceiro (Portuguese): third

Definitions

third

Ancestry of “terceiro”, step by step

Step	Language	Word	Meaning
1	Old Portuguese	terçeiro	—
2	Latin	tertiārius	containing a third part
3	Latin	tertius	third, the ordinal number after secundus and...
4	Latin	trēs	three; 3
5	Proto-Italic	trēs	three
6	Proto-Indo-European	*tréyes	—

Words derived from “terceiro”

terceiras
terceirizar
terceiramente
3ªs
terceirização

Every word from Proto-Indo-European *tréyes →Every word from Proto-Italic trēs →Every word from Latin trēs →