Where does “*airu” come from?

*airu (Proto-West Germanic) comes from Proto-Germanic airuz, from Proto-Indo-European ey- — to go.

Ancestry of “*airu”, step by step

StepLanguageWordMeaning
1Proto-Germanicairuzmessenger; servant; herald
2Proto-Indo-Europeaney-to go
Every word from Proto-Indo-European ey- →Every word from Proto-Germanic airuz →