Where does “grasnykra” come from?

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

grasnykra (Icelandic): grass-leaved pondweed (Potamogeton gramineus)

Definitions

  1. grass-leaved pondweed (Potamogeton gramineus)

Ancestry of “grasnykra”, step by step

grasnykra 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 grás

StepLanguageWordMeaning
1Icelandicgrásmasculine genitive singular positive degree of...
2Old Norsegrasgrass, herbage; a herb, usually with special...
3Proto-Germanicgrasągrass
4Proto-Indo-Europeanǵʰreh₁-to become green, grow; to grow; to green, to grow
Every word from Proto-Indo-European neygʷ-Every word from Proto-Germanic nikwiz-Every word from Old Norse nykr