Where does “bisunni” come from?

bisunni (Frankish) comes from Proto-West Germanic bisunnju, from Proto-West Germanic sunnju, from Proto-Germanic sunjō, from Proto-Indo-European h₁s-ónt-ih₂, from Proto-Indo-European h₁sónts, from Proto-Indo-European h₁ēs- — to be.

Ancestry of “bisunni”, step by step

StepLanguageWordMeaning
1Proto-West Germanicbisunnju
2Proto-West Germanicsunnjuresponsibility; care; concern; worry; anxiety
3Proto-Germanicsunjōtruth, sooth; denial, protest
4Proto-Indo-Europeanh₁s-ónt-ih₂
5Proto-Indo-Europeanh₁sóntsactive participle of *h₁ésti; being, existence;...
6Proto-Indo-Europeanh₁ēs-to be
Every word from Proto-Indo-European h₁ēs-Every word from Proto-Indo-European h₁sóntsEvery word from Proto-Indo-European h₁s-ónt-ih₂