Where does “nøkkelhull” come from?

nøkkelhull (Norwegian Bokmål) comes from Norwegian Bokmål nøkkel, from Middle Norwegian nykill, from Old Norse lykill, from Old Norse lúka, from Proto-Germanic lūkaną, from Proto-Indo-European lewǵ- — to break, tear; to break, shatter.

nøkkelhull (Norwegian Bokmål): a keyhole; a keyhole symbol

Definitions

  1. a keyhole; a keyhole symbol

Ancestry of “nøkkelhull”, step by step

nøkkelhull traces back through two separate lines of ancestry.

via Norwegian Bokmål nøkkel

StepLanguageWordMeaning
1Norwegian Bokmålnøkkela key; a spanner or wrench
2Middle Norwegiannykillkey
3Old Norselykillkey
4Old Norselúkato shut; to end, bring to an end, finish,...
5Proto-Germaniclūkanąto close, to shut; Alternative form of *leukaną
6Proto-Indo-Europeanlewǵ-to break, tear; to break, shatter

via Norwegian Bokmål hull

StepLanguageWordMeaning
1Norwegian Bokmålhulla hole; imperative of hulle
2Danishhulhole; gap; blank
3Old Norsehóla hole
4Proto-Germanichuląa hollow; depression; hole
5Proto-Germanichulazhollow
6Proto-Indo-Europeanḱel-to cover; to incline
Every word from Proto-Indo-European lewǵ-Every word from Proto-Germanic lūkanąEvery word from Old Norse lúka