Where does “undim” come from?

undim (English) comes from English Dim, from Middle English dim, from Old English dim, from Old English dimm, from Proto-Germanic dimmaz, from Proto-Indo-European dʰem- — to whisk, smoke, blow; dust, haze, cloud; obscure.

undim (English): To make no longer dim; to brighten or illuminate

Definitions

  1. To make no longer dim; to brighten or illuminate

Ancestry of “undim”, step by step

undim traces back through two separate lines of ancestry.

via English Dim

StepLanguageWordMeaning
1EnglishDim(from Bashkir Дим)
2Middle Englishdim
3Old Englishdim
4Old Englishdimmdim
5Proto-Germanicdimmazdark; gloomy
6Proto-Indo-Europeandʰem-to whisk, smoke, blow; dust, haze, cloud; obscure

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European dʰem-