Where does “ostefni” come from?

ostefni (Icelandic) comes from Icelandic efni, from Old Norse efni, from Proto-Germanic abniją, from Proto-Germanic *abnijaną, from Proto-Indo-European ōp- — to achieve.

ostefni (Icelandic): curd; casein

Definitions

  1. curd; casein

Ancestry of “ostefni”, step by step

ostefni traces back through two separate lines of ancestry.

via Icelandic efni

StepLanguageWordMeaning
1Icelandicefnifabric; material; subject, matter
2Old Norseefnistuff, material; matter of discourse; matter,...
3Proto-GermanicabnijąThat which is made; material; stuff
4Proto-Germanic*abnijaną—
5Proto-Indo-Europeanōp-to achieve

via Icelandic ostur

StepLanguageWordMeaning
1Icelandicosturcheese; smegma
2Old Norseostrcheese
3Proto-Germanicjustazcheese
4Proto-Indo-Europeanyaus-—
5Proto-Indo-Europeanyew(ǝ)-to blend, mix , knead
Every word from Proto-Indo-European ōp- →Every word from Proto-Germanic *abnijaną →Every word from Proto-Germanic abniją →