Where does “sŵau” come from?

sŵau (Welsh) comes from Welsh sw, from English zoo, from Ancient Greek ζῷον, from Proto-Hellenic ďṓyyon, from Proto-Hellenic gʷyōwyon, from Proto-Indo-European gʷyeh₃w-y-om, from Proto-Indo-European gʷíh₃weti, from Proto-Indo-European gʷih₃wós — to live.

Ancestry of “sŵau”, step by step

StepLanguageWordMeaning
1Welshswzoo
2EnglishzooA park where live animals are exhibited; Any...
3Ancient Greekζῷονanimal, beast; form, image
4Proto-Hellenicďṓyyonanimal, creature, beast
5Proto-Hellenicgʷyōwyon
6Proto-Indo-Europeangʷyeh₃w-y-om
7Proto-Indo-Europeangʷíh₃wetito live, to be alive
8Proto-Indo-Europeangʷih₃wósalive, living
9Proto-Indo-Europeangʷeih₃w-to live
Every word from Proto-Indo-European gʷeih₃w-Every word from Proto-Indo-European gʷih₃wósEvery word from Proto-Indo-European gʷíh₃weti