Where does “echmairt” come from?

echmairt (Middle Irish) comes from Old Irish ech, from Primitive Irish ᚓᚊᚐᚄ, from Proto-Celtic ekʷos, from Proto-Indo-European h₁éḱwos, from Proto-Indo-European h₁oh₁ḱu- — swift.

Ancestry of “echmairt”, step by step

StepLanguageWordMeaning
1Old Irishechhorse
2Primitive Irishᚓᚊᚐᚄhorse
3Proto-Celticekʷoshorse
4Proto-Indo-Europeanh₁éḱwosstallion, horse
5Proto-Indo-Europeanh₁oh₁ḱu-swift

Words derived from “echmairt

Every word from Proto-Indo-European h₁oh₁ḱu-Every word from Proto-Indo-European h₁éḱwosEvery word from Proto-Celtic ekʷos