Where does “un deg pump” come from?

un deg pump (Welsh) comes from Welsh pump, from Middle Welsh pymp, from Old Welsh pimp, from Proto-Brythonic pɨmp, from Proto-Celtic kʷenkʷe, from Proto-Indo-European pénkʷe — five.

un deg pump (Welsh): fifteen

Definitions

  1. fifteen

Ancestry of “un deg pump”, step by step

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

via Welsh pump

StepLanguageWordMeaning
1Welshpumpfive
2Middle Welshpymp
3Old Welshpimp
4Proto-Brythonicpɨmpfive
5Proto-Celtickʷenkʷefive
6Proto-Indo-Europeanpénkʷefive

via Welsh un

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

via Welsh deg

StepLanguageWordMeaning
1Welshdegten; Soft mutation of teg
2Proto-Brythonicdegten
3Proto-Celticdekamten
4Proto-Indo-Europeandéḱm̥ten
Every word from Proto-Indo-European pénkʷeEvery word from Proto-Celtic kʷenkʷeEvery word from Proto-Brythonic pɨmp