Where does “unfruitfulness” come from?

unfruitfulness (English) comes from English unfruitful, from English fruitful, from Middle English fruitefull, from Middle English -ful, from Old English -ful, from Proto-Germanic -fullaz, from Proto-Germanic fullaz, from Proto-Indo-European pl̥h₁nós — to fill.

unfruitfulness (English): the state or property of being unfruitful;...

Definitions

  1. the state or property of being unfruitful;...

Ancestry of “unfruitfulness”, step by step

unfruitfulness traces back through two separate lines of ancestry.

via English unfruitful

StepLanguageWordMeaning
1EnglishunfruitfulNot bearing fruit
2EnglishfruitfulFavourable to the growth of fruit or useful...
3Middle Englishfruitefull
4Middle English-fulAppended to nouns to form adjectives denoting...
5Old English-fulfull of; -ful
6Proto-Germanic-fullaz-ful
7Proto-Germanicfullazfull; the whole, the entire
8Proto-Indo-Europeanpl̥h₁nósfull
9Proto-Indo-Europeanpleh₁-to fill

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European pleh₁-Every word from Proto-Indo-European pl̥h₁nósEvery word from Proto-Germanic fullaz