Where does “mainaiþ” come from?

mainaiþ (Proto-West Germanic) comes from Proto-Germanic mainaiþaz, from Proto-Germanic aiþaz, from Proto-Indo-European oyt-.

Ancestry of “mainaiþ”, step by step

StepLanguageWordMeaning
1Proto-Germanicmainaiþazperjury
2Proto-Germanicaiþazoath
3Proto-Indo-Europeanoyt-—

Words derived from “mainaiþ”

Every word from Proto-Indo-European oyt- →Every word from Proto-Germanic aiþaz →Every word from Proto-Germanic mainaiþaz →