Where does “isvak” come from?

isvak (Swedish) comes from Swedish is, from Old Swedish is, from Old Norse íss, from Proto-Germanic īsą, from Proto-Indo-European h₁eyH- — ice, frost.

isvak (Swedish): a (natural or cut) opening in an ice cover, a hole in the ice

Definitions

  1. a (natural or cut) opening in an ice cover, a hole in the ice

Ancestry of “isvak”, step by step

isvak traces back through two separate lines of ancestry.

via Swedish is

StepLanguageWordMeaning
1SwedishisIce; frozen water; Ice; a sheet of ice lying on a...
2Old Swedishis
3Old Norseíssice
4Proto-Germanicīsąice
5Proto-Indo-Europeanh₁eyH-ice, frost

via Swedish vak

StepLanguageWordMeaning
1Swedishvakpolynya, a hole in a sheet of ice; vigil,...
2Old Norsevǫka hole in the ice, a polynya
3Proto-Germanicwakwōa hole in the water, a polynya
4Proto-Indo-Europeanwegʷ-wet, moist
Every word from Proto-Indo-European h₁eyH-Every word from Proto-Germanic īsąEvery word from Old Norse íss