Where does “niþful” come from?

niþful (Old English) comes from Old English -ful, from Proto-Germanic -fullaz, from Proto-Germanic fullaz, from Proto-Indo-European pl̥h₁nós, from Proto-Indo-European pleh₁- — to fill.

Ancestry of “niþful”, step by step

StepLanguageWordMeaning
1Old English-fulfull of; -ful
2Proto-Germanic-fullaz-ful
3Proto-Germanicfullazfull; the whole, the entire
4Proto-Indo-Europeanpl̥h₁nósfull
5Proto-Indo-Europeanpleh₁-to fill
Every word from Proto-Indo-European pleh₁- →Every word from Proto-Indo-European pl̥h₁nós →Every word from Proto-Germanic fullaz →