Where does “tweenness” come from?

tweenness (English) comes from English tween, from English twenty, from Middle English twenty, from Old English twēntiġ, from Proto-Germanic twai tigiwiz, from Proto-Germanic twai, from Proto-Indo-European dwóh₁ — two.

tweenness (English): The quality of being a tween

Definitions

  1. The quality of being a tween

Ancestry of “tweenness”, step by step

tweenness traces back through two separate lines of ancestry.

via English tween

StepLanguageWordMeaning
1EnglishtweenAn action of tweening (inserting frames for continuity); a sequence of frames generated by tweening
2EnglishtwentyThe cardinal number 20, occurring after nineteen...
3Middle EnglishtwentyAlternative form of twenti
4Old Englishtwēntiġtwenty
5Proto-Germanictwai tigiwiztwenty
6Proto-Germanictwaitwo
7Proto-Indo-Europeandwóh₁two

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 dwóh₁Every word from Proto-Germanic twaiEvery word from Proto-Germanic twai tigiwiz