Where does “thirdness” come from?

thirdness (English) comes from English third, from Middle English thirde, from Old English þridda, from Proto-West Germanic *þriddjō, from Proto-Germanic þridjô, from Proto-Indo-European tretyós, from Proto-Indo-European tr̥tyós, from Proto-Indo-European tréyes — three.

thirdness (English): The quality of being or coming third

Definitions

  1. The quality of being or coming third

Ancestry of “thirdness”, step by step

thirdness traces back through two separate lines of ancestry.

via English third

StepLanguageWordMeaning
1EnglishthirdThe ordinal form of the cardinal number three;...
2Middle Englishthirde
3Old Englishþriddathird
4Proto-West Germanic*þriddjōthird
5Proto-Germanicþridjôthird
6Proto-Indo-Europeantretyós
7Proto-Indo-Europeantr̥tyósthird
8Proto-Indo-Europeantréyesthree

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 tréyes
thirdness — Etymology, Origin & Word History | Etymology Explorer