Where does “deg a thrigain” come from?

deg a thrigain (Welsh) comes from Welsh trigain, from Welsh ugain, from Old Welsh uceint, from Proto-Brythonic ʉgėnt, from Proto-Celtic wikantī, from Proto-Indo-European h₁wih₁ḱm̥t, from Proto-Indo-European dwi(h₁)dḱm̥ti — two tens; two decades; twenty; two-ten.

deg a thrigain (Welsh): seventy

Definitions

  1. seventy

Ancestry of “deg a thrigain”, step by step

deg a thrigain traces back through 3 separate lines of ancestry.

via Welsh trigain

StepLanguageWordMeaning
1Welshtrigainsixty, three score; sixty
2Welshugaintwenty; score
3Old Welshuceint
4Proto-Brythonicʉgėnt
5Proto-Celticwikantītwenty
6Proto-Indo-Europeanh₁wih₁ḱm̥t
7Proto-Indo-Europeandwi(h₁)dḱm̥titwo tens; two decades; twenty; two-ten

via Welsh deg

StepLanguageWordMeaning
1Welshdegten; Soft mutation of teg
2Proto-Brythonicdegten
3Proto-Celticdekamten
4Proto-Indo-Europeandéḱm̥ten

via Welsh a

StepLanguageWordMeaning
1Welshafirst-person singular future of mynd; and; that,...
2Old Welshac
3Proto-Brythonic(h)a
Every word from Proto-Indo-European dwi(h₁)dḱm̥ti