Where does “kjernereaktor” come from?

kjernereaktor (Norwegian Nynorsk) comes from Norwegian Nynorsk kjerne, from Old Norse kjarni, from Proto-Germanic kernô, from Proto-Indo-European ǵr̥h₂nóm, from Proto-Indo-European ǵr̥h₂nós, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

kjernereaktor (Norwegian Nynorsk): a nuclear reactor

Definitions

  1. a nuclear reactor

Ancestry of “kjernereaktor”, step by step

kjernereaktor traces back through two separate lines of ancestry.

via Norwegian Nynorsk kjerne

StepLanguageWordMeaning
1Norwegian Nynorskkjernecore, nucleus; essence
2Old Norsekjarnikernel, core; core
3Proto-Germanickernôkernel, core
4Proto-Indo-Europeanǵr̥h₂nómgrain
5Proto-Indo-Europeanǵr̥h₂nósmatured, grown old
6Proto-Indo-Europeanǵerh₂-to grow old, to mature

via Norwegian Nynorsk reaktor

StepLanguageWordMeaning
1Norwegian Nynorskreaktora reactor
Every word from Proto-Indo-European ǵerh₂- →Every word from Proto-Indo-European ǵr̥h₂nós →Every word from Proto-Indo-European ǵr̥h₂nóm →