Where does “tanwydd” come from?

tanwydd (Welsh) comes from Welsh gwŷdd, from Middle Welsh gwyð, from Proto-Brythonic *gwuɨð, from Proto-Celtic *weidus, from Proto-Indo-European h₁weydʰh₁-, from Proto-Indo-European dwi-, from Proto-Indo-European dwóh₁ — two.

tanwydd (Welsh): firewood; fuel

Definitions

  1. firewood; fuel

Ancestry of “tanwydd”, step by step

tanwydd traces back through two separate lines of ancestry.

via Welsh gwŷdd

StepLanguageWordMeaning
1Welshgwŷddloom; trees; plough
2Middle Welshgwyð—
3Proto-Brythonic*gwuɨðappearance, presence, face, sight, image
4Proto-Celtic*weiduswild
5Proto-Indo-Europeanh₁weydʰh₁-to separate, divide
6Proto-Indo-Europeandwi-two; apart, asunder
7Proto-Indo-Europeandwóh₁two

via Welsh tân

StepLanguageWordMeaning
1Welshtânfire
2Middle Welshtan—
3Proto-Brythonictanunder; fire
4Proto-Celticteɸnetsfire
5Proto-Indo-Europeantep-to be warm, be hot
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Indo-European dwi- →Every word from Proto-Indo-European h₁weydʰh₁- →