Where does “tretias” come from?

tretias (Proto-Balto-Slavic) comes from Proto-Balto-Slavic tirtias, from Proto-Indo-European tr̥tyos, from Proto-Indo-European *tréyes.

Ancestry of “tretias”, step by step

StepLanguageWordMeaning
1Proto-Balto-Slavictirtias—
2Proto-Indo-Europeantr̥tyos—
3Proto-Indo-European*tréyes—

Words derived from “tretias”

Every word from Proto-Indo-European *tréyes →Every word from Proto-Indo-European tr̥tyos →Every word from Proto-Balto-Slavic tirtias →