Where does “epālos” come from?

epālos (Proto-Celtic) comes from Proto-Celtic ekʷālos, from Proto-Celtic ekʷos, from Proto-Indo-European h₁éḱwos, from Proto-Indo-European h₁oh₁ḱu- — swift.

Ancestry of “epālos”, step by step

StepLanguageWordMeaning
1Proto-Celticekʷālosfoal
2Proto-Celticekʷoshorse
3Proto-Indo-Europeanh₁éḱwosstallion, horse
4Proto-Indo-Europeanh₁oh₁ḱu-swift
Every word from Proto-Indo-European h₁oh₁ḱu- →Every word from Proto-Indo-European h₁éḱwos →Every word from Proto-Celtic ekʷos →