Where does “istid” come from?

istid (Norwegian Nynorsk) comes from Norwegian Nynorsk tid, from Old Norse tíðr, from Proto-Germanic tīdijaz, from Proto-Germanic tīdiz, from Proto-Indo-European déh₂itis, from Proto-Indo-European deh₂y-, from Proto-Indo-European deh₂- — to share, divide.

istid (Norwegian Nynorsk): ice age

Definitions

  1. ice age

Ancestry of “istid”, step by step

istid traces back through two separate lines of ancestry.

via Norwegian Nynorsk tid

StepLanguageWordMeaning
1Norwegian Nynorsktidtime; an age or era
2Old Norsetíðrfrequent, usual; often spoke of, noted, famous;...
3Proto-Germanictīdijazfrequent, often
4Proto-Germanictīdiztime; period, interval
5Proto-Indo-Europeandéh₂itisinterval, period of time
6Proto-Indo-Europeandeh₂y-to share, divide
7Proto-Indo-Europeandeh₂-to share, divide

via Norwegian Nynorsk is

StepLanguageWordMeaning
1Norwegian Nynorskisice; ice cream
2Old Norseíssice
3Proto-Germanicīsąice
4Proto-Indo-Europeanh₁eyH-ice, frost
Every word from Proto-Indo-European deh₂- →Every word from Proto-Indo-European deh₂y- →Every word from Proto-Indo-European déh₂itis →