Where does “πού” come from?

πού (Byzantine Greek) comes from Ancient Greek ὅπου, from Ancient Greek ὅς, from Proto-Indo-European yós, from Proto-Finnic wiša, from Proto-Indo-Iranian wišás, from Proto-Indo-European wisós — fluidity, slime, poison; poison; poison; slime;...

Ancestry of “πού”, step by step

StepLanguageWordMeaning
1Ancient Greekὅπουwhere; 46 CE – 120 CE, Plutarch, Moralia 2.427C
2Ancient Greekὅςthis; who, which, that; his, her, its
3Proto-Indo-Europeanyósthat, who, which
4Proto-Finnicwiša
5Proto-Indo-Iranianwišáspoison, venom
6Proto-Indo-Europeanwisósfluidity, slime, poison; poison; poison; slime;...

Words derived from “πού

Every word from Proto-Indo-European wisósEvery word from Proto-Indo-Iranian wišásEvery word from Proto-Finnic wiša