Where does “hjartanykra” come from?

hjartanykra (Icelandic) comes from Icelandic nykra, from Icelandic nykur, from Old Norse nykr, from Proto-Germanic nikwiz-, from Proto-Indo-European neygʷ- — to wash.

hjartanykra (Icelandic): clasping-leaf pondweed, perfoliate pondweed (Potamogeton perfoliatus)

Definitions

  1. clasping-leaf pondweed, perfoliate pondweed (Potamogeton perfoliatus)

Ancestry of “hjartanykra”, step by step

hjartanykra traces back through two separate lines of ancestry.

via Icelandic nykra

StepLanguageWordMeaning
1Icelandicnykrapondweed plant of the genus
2Icelandicnykura water-demon, the nixie, the nick
3Old Norsenykra water-demon, the nixie, the nick; mostly appearing as a grey horse-like creature with inverted hoofs and forward fetlocks that emerges from lakes
4Proto-Germanicnikwiz-
5Proto-Indo-Europeanneygʷ-to wash

via Icelandic hjarta

StepLanguageWordMeaning
1Icelandichjartaheart
2Old Norsehjartaheart
3Proto-Germanichertôheart
4Proto-Indo-Europeanḱḗrheart
Every word from Proto-Indo-European neygʷ-Every word from Proto-Germanic nikwiz-Every word from Old Norse nykr