Where does “seventeenness” come from?

seventeenness (English) comes from English seventeen, from Middle English seventene, from Old English seofontīene, from Proto-Germanic sebuntehun, from Proto-Germanic sebun, from Proto-Germanic sebunt, from Proto-Indo-European septḿ̥ — seven.

seventeenness (English): The property of being seventeen

Definitions

  1. The property of being seventeen

Ancestry of “seventeenness”, step by step

seventeenness traces back through two separate lines of ancestry.

via English seventeen

StepLanguageWordMeaning
1EnglishseventeenThe cardinal number occurring after sixteen and...
2Middle Englishseventeneseventeen
3Old Englishseofontīeneseventeen
4Proto-Germanicsebuntehunseventeen
5Proto-Germanicsebunseven
6Proto-Germanicsebunt
7Proto-Indo-Europeanseptḿ̥seven

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 septḿ̥Every word from Proto-Germanic sebuntEvery word from Proto-Germanic sebun