Where does “undec” come from?

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

undec (Middle Welsh): eleven

Definitions

  1. eleven

Ancestry of “undec”, step by step

undec traces back through two separate lines of ancestry.

via Middle Welsh un

StepLanguageWordMeaning
1Middle Welshunone
2Proto-Brythonicʉnone
3Proto-Celticoinosone
4Proto-Indo-Europeanóynosone; single

via Middle Welsh dec

StepLanguageWordMeaning
1Middle Welshdec—

Words derived from “undec”

Every word from Proto-Indo-European óynos →Every word from Proto-Celtic oinos →Every word from Proto-Brythonic ʉn →