Where does “un deg naw” come from?

un deg naw (Welsh) comes from Welsh un, from Middle Welsh un, from Proto-Brythonic ʉn, from Proto-Celtic oinos, from Proto-Indo-European óynos — one; single.

un deg naw (Welsh): nineteen

Definitions

  1. nineteen

Ancestry of “un deg naw”, step by step

un deg naw traces back through 3 separate lines of ancestry.

via Welsh un

StepLanguageWordMeaning
1Welshunonly; one; one, individual
2Middle Welshunone
3Proto-Brythonicʉnone
4Proto-Celticoinosone
5Proto-Indo-Europeanóynosone; single

via Welsh naw

StepLanguageWordMeaning
1Welshnawnine; Nasal mutation of daw
2Proto-Brythonicnawnine
3Proto-Celticnawannine
4Proto-Austronesian*nihawa
5Proto-AustronesianniSawabreath

via Welsh deg

StepLanguageWordMeaning
1Welshdegten; Soft mutation of teg
2Proto-Brythonicdegten
3Proto-Celticdekamten
4Proto-Indo-Europeandéḱm̥ten
Every word from Proto-Indo-European óynos