Where does “aiwa” come from?

aiwa (Proto-Germanic) comes from Old Tupi aíba, from Old Tupi -a, from Proto-Tupi-Guarani *-aβ — instrumentalizer suffix.

Ancestry of “aiwa”, step by step

StepLanguageWordMeaning
1Old Tupiaíbawickedness
2Old Tupi-aforms nouns from a word's stem
3Proto-Tupi-Guarani*-aβinstrumentalizer suffix
Every word from Proto-Tupi-Guarani *-aβ →Every word from Old Tupi -a →Every word from Old Tupi aíba →