Where does “nos Sadwrn” come from?

nos Sadwrn (Welsh) comes from Welsh nos, from Middle Welsh nos, from Latin nox, from Proto-Italic nokts, from Proto-Indo-European nókʷts, from Proto-Indo-European negʷ- — bare, naked.

nos Sadwrn (Welsh): Saturday night

Definitions

  1. Saturday night

Ancestry of “nos Sadwrn”, step by step

nos Sadwrn traces back through two separate lines of ancestry.

via Welsh nos

StepLanguageWordMeaning
1Welshnosnight
2Middle Welshnos—
3Latinnoxnight; darkness; a dream
4Proto-Italicnoktsnight
5Proto-Indo-Europeannókʷtsnight
6Proto-Indo-Europeannegʷ-bare, naked

via Welsh Sadwrn

StepLanguageWordMeaning
1WelshSadwrnSaturn, Saturday
2Proto-Brythonic*Sadurn—
Every word from Proto-Indo-European negʷ- →Every word from Proto-Indo-European nókʷts →Every word from Proto-Italic nokts →