Where does “duo” come from?

duo (Welsh) comes from Welsh du, from Proto-Brythonic duβ, from Proto-Celtic dubus, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

duo (Welsh): to make black, to blacken also figuratively

Definitions

  1. to make black, to blacken also figuratively

Ancestry of “duo”, step by step

StepLanguageWordMeaning
1Welshdublack
2Proto-Brythonicduβblack
3Proto-Celticdubusblack
4Proto-Indo-Europeandʰewbʰ-deep
5Proto-Indo-Europeandʰewh₂-smoke; mist, haze
Every word from Proto-Indo-European dʰewh₂- →