Where does “unhelpfulness” come from?

unhelpfulness (English) comes from English unhelpful, from English helpful, from English -ful, from Middle English -ful, from Old English -ful, from Proto-Germanic -fullaz, from Proto-Germanic fullaz, from Proto-Indo-European pl̥h₁nós — to fill.

unhelpfulness (English): The state of being unhelpful

Definitions

  1. The state of being unhelpful

Ancestry of “unhelpfulness”, step by step

unhelpfulness traces back through two separate lines of ancestry.

via English unhelpful

StepLanguageWordMeaning
1EnglishunhelpfulNot providing help or assistance; not helpful
2EnglishhelpfulFurnishing help; giving aid; useful
3English-fulUsed to form adjectives from nouns. Full of,...
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-