Where does “unionsyth” come from?

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

unionsyth (Welsh): perfectly straight

Definitions

  1. perfectly straight

Ancestry of “unionsyth”, step by step

unionsyth traces back through two separate lines of ancestry.

via Welsh union

StepLanguageWordMeaning
1Welshunionexact
2Welshunonly; one; one, individual
3Middle Welshunone
4Proto-Brythonicʉnone
5Proto-Celticoinosone
6Proto-Indo-Europeanóynosone; single

via Welsh syth

StepLanguageWordMeaning
1Welshsythstraight
2Proto-Celticsizdos—
3Proto-Indo-Europeansísdetito be sitting down
4Proto-Indo-Europeansḗd-to sit
Every word from Proto-Indo-European óynos →