Where does “thirteenness” come from?

thirteenness (English) comes from English thirteen, from Middle English thirttene, from Old English þrēotīene, from Proto-Germanic þritehun, from Proto-Germanic tehun, from Proto-Indo-European déḱm̥t — ten.

thirteenness (English): The property of being thirteen

Definitions

  1. The property of being thirteen

Ancestry of “thirteenness”, step by step

thirteenness traces back through two separate lines of ancestry.

via English thirteen

StepLanguageWordMeaning
1EnglishthirteenThe cardinal number occurring after twelve and...
2Middle Englishthirttene
3Old Englishþrēotīenethirteen
4Proto-Germanicþritehunthirteen
5Proto-Germanictehunten
6Proto-Indo-Europeandéḱm̥tten

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 déḱm̥tEvery word from Proto-Germanic tehunEvery word from Proto-Germanic þritehun