Where does “zoothanasia” come from?

zoothanasia (English) comes 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, from Proto-Indo-European gʷeih₃w- — to live.

zoothanasia (English): The killing of an otherwise healthy animal belonging to a zoo, for management reasons

Definitions

  1. The killing of an otherwise healthy animal belonging to a zoo, for management reasons

Ancestry of “zoothanasia”, step by step

zoothanasia traces back through two separate lines of ancestry.

via English zoo

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

via English euthanasia

StepLanguageWordMeaning
1EnglisheuthanasiaThe practice of intentionally and painlessly...
2Ancient Greekεὐθανασίαeasy, happy death
3Ancient GreekΘάνατοςThanatos
4Ancient GreekθνῄσκωI die; I am dead; to be killed
5Ancient Greek-σκωPrimitive suffix used to form present-tense...
6Proto-Indo-European-sḱétiForms durative or iterative imperfective verbs...
Every word from Proto-Indo-European gʷeih₃w-Every word from Proto-Indo-European gʷih₃wósEvery word from Proto-Indo-European gʷíh₃weti