callipygian

The story

1. Ancient Greekκᾰλός (kălós)
2. Ancient Greekκᾰ́λλος (kắllos)
3. Proto-Indo-European*spugeh₂
4. Ancient Greekπῡγή (pūgḗ)
5. Ancient Greekκαλλίπυγος (kallípugos)
6. English todaycallipygian

From Ancient Greek καλλίπυγος (kallípugos) + -ian, from κάλλος (kállos, “beauty”) + πυγή (pugḗ, “buttocks”).