The story
- Proto-Indo-European*gʷeyh₃-
- Proto-Indo-European*gʷyéh₃-w-os
- Proto-Hellenic*d͏̌ōwós
- Ancient Greekζωός (zōós)
- Ancient Greekζώῐ̈ον (zṓĭ̈on)
- Ancient Greekζῷον (zōîon)
- Englishzoo-
- Englishpsychology
- English todayzoopsychology
From zoo- + psychology.
Etymology from Wiktionary, CC BY-SA 4.0.