Where does “trigeinfed” come from?

trigeinfed (Welsh) comes from Welsh ugeinfed, 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.

trigeinfed (Welsh): sixtieth

Definitions

  1. sixtieth

Ancestry of “trigeinfed”, step by step

trigeinfed traces back through two separate lines of ancestry.

via Welsh ugeinfed

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

via Welsh tri

StepLanguageWordMeaning
1Welshtrithree
2Proto-Brythonictrithree
3Proto-Celtictrīsthree
4Proto-Indo-European*tréyes
Every word from Proto-Indo-European dwi(h₁)dḱm̥tiEvery word from Proto-Indo-European h₁wih₁ḱm̥tEvery word from Proto-Celtic wikantī