Where does “bahha” come from?

bahha (Old High German) comes from Proto-West Germanic bak, from Proto-Germanic baką, from Proto-Indo-European bʰeg- — to break.

Ancestry of “bahha”, step by step

StepLanguageWordMeaning
1Proto-West Germanicbakback
2Proto-Germanicbakąback, rear
3Proto-Indo-Europeanbʰeg-to break
Every word from Proto-Indo-European bʰeg- →Every word from Proto-Germanic baką →Every word from Proto-West Germanic bak →