Where does “skillfull” come from?

skillfull (English) comes from English full, from Middle English fúl, 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 “skillfull”, step by step

skillfull traces back through two separate lines of ancestry.

via English full

StepLanguageWordMeaning
1EnglishfullContaining the maximum possible amount that can...
2Middle Englishfúlvery; much; to a great extent
3Old Englishfullfull, filled, complete, entire; a beaker; a cup,...
4Proto-West Germanicfullfull
5Proto-Germanicfullazfull; the whole, the entire
6Proto-Indo-Europeanpl̥h₁nósfull
7Proto-Indo-Europeanpleh₁-to fill

via English skill

StepLanguageWordMeaning
1EnglishskillCapacity to do something well; technique,...
2Middle Englishskill
3Old Norseskila distinction, discernment, knowledge
4Proto-Germanicskiljąseparation, limit
5Proto-Indo-European(s)kelH-to cut; to split, to separate
6Proto-Indo-European(s)kel-to bend, crook; bent, crooked; leg, heel, knee,...
Every word from Proto-Indo-European pleh₁-Every word from Proto-Indo-European pl̥h₁nósEvery word from Proto-Germanic fullaz