Where does “merddwr” come from?

merddwr (Welsh) comes from Welsh dŵr, from Middle Welsh dwfyr, from Proto-Brythonic duβr, from Proto-Celtic dubros, from Proto-Indo-European dʰubʰrós, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

merddwr (Welsh): stagnant water, standing water

Definitions

  1. stagnant water, standing water

Ancestry of “merddwr”, step by step

merddwr traces back through two separate lines of ancestry.

via Welsh dŵr

StepLanguageWordMeaning
1Welshdŵrwater; Soft mutation of tŵr
2Middle Welshdwfyrwater
3Proto-Brythonicduβrwater
4Proto-Celticdubrosdark; water
5Proto-Indo-Europeandʰubʰrósdeep
6Proto-Indo-Europeandʰewbʰ-deep
7Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via Welsh merf

StepLanguageWordMeaning
1Welshmerfinsipid, tasteless
2Middle Welshmerf—
3Proto-Brythonic*merw—
4Proto-Celtic*merwislifeless
Every word from Proto-Indo-European dʰewh₂- →Every word from Proto-Indo-European dʰewbʰ- →Every word from Proto-Indo-European dʰubʰrós →