Where does “blwyddiadur” come from?

blwyddiadur (Welsh) comes from Welsh blwydd, from Middle Welsh blwyddyn, from Old Welsh bloidin, from Proto-Celtic blēdanī, from Proto-Indo-European bʰloyd- — pale.

blwyddiadur (Welsh): yearbook, annual

Definitions

  1. yearbook, annual

Ancestry of “blwyddiadur”, step by step

StepLanguageWordMeaning
1Welshblwyddyear
2Middle Welshblwyddyn—
3Old Welshbloidin—
4Proto-Celticblēdanīyear
5Proto-Indo-Europeanbʰloyd-pale
Every word from Proto-Indo-European bʰloyd- →Every word from Proto-Celtic blēdanī →Every word from Old Welsh bloidin →