Where does “full” come from?

full (Middle English) comes from Old English full, from Proto-West Germanic full, from Proto-Germanic fullaz, from Proto-Indo-European pl̥h₁nós, from Proto-Indo-European pleh₁- — to fill.

Ancestry of “full”, step by step

StepLanguageWordMeaning
1Old Englishfullfull, filled, complete, entire; a beaker; a cup,...
2Proto-West Germanicfullfull
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 →