Where does “undrain” come from?

undrain (English) comes from English drain, from Middle English dreinen, from Old English drēahnian, from Proto-Germanic drauhnōną, from Proto-Germanic draugiz, from Proto-Indo-European dʰerǵʰ-, from Proto-Indo-European dʰer- — to support; to hold.

undrain (English): To restore that which has drained away

Definitions

  1. To restore that which has drained away

Ancestry of “undrain”, step by step

undrain traces back through two separate lines of ancestry.

via English drain

StepLanguageWordMeaning
1EnglishdrainA conduit allowing liquid to flow out of an...
2Middle Englishdreinen
3Old Englishdrēahnianto drain, strain, filter
4Proto-Germanicdrauhnōnąto strain, sieve
5Proto-Germanicdraugizhard, solid; dry
6Proto-Indo-Europeandʰerǵʰ-to strengthen; to strengthen; become hard; to...
7Proto-Indo-Europeandʰer-to support; to hold

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European dʰer-Every word from Proto-Indo-European dʰerǵʰ-Every word from Proto-Germanic draugiz