Where does “onbufan” come from?

onbufan (Old English) comes from Old English bufan, from Proto-West Germanic *biobanā, from Proto-West Germanic *obanā, from Proto-Germanic ubanē, from Proto-Germanic upp, from Proto-Germanic ub, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

Ancestry of “onbufan”, step by step

onbufan traces back through two separate lines of ancestry.

via Old English bufan

StepLanguageWordMeaning
1Old Englishbufanabove
2Proto-West Germanic*biobanā—
3Proto-West Germanic*obanāfrom above
4Proto-Germanicubanēfrom above
5Proto-Germanicuppup, upwards
6Proto-Germanicubunder
7Proto-Indo-Europeanupóunder, below
8Proto-Indo-Europeanh₃ewp-—

via Old English a

StepLanguageWordMeaning
1Old Englishaever, always
2Proto-Germanicaiwazlong time, age, eternity
3Proto-Indo-Europeanh₂eyu-vitality; eternal; vital force, life, long life,...
4Proto-Indo-Europeanh₂ey-vital force, life, age, eternity; day, morning
Every word from Proto-Indo-European h₃ewp- →Every word from Proto-Indo-European upó →Every word from Proto-Germanic ub →