Where does “tregrense” come from?

tregrense (Norwegian Nynorsk) comes from Norwegian Nynorsk tre, from Old Norse tré, from Proto-Germanic trewą, from English doru, from Ancient Greek δόρυ, from Proto-Hellenic dóru, from Proto-Indo-European dóru, from Proto-Indo-European drew- — hard, firm, strong, solid; hard, fast; tree.

tregrense (Norwegian Nynorsk): treeline

Definitions

  1. treeline

Ancestry of “tregrense”, step by step

tregrense traces back through two separate lines of ancestry.

via Norwegian Nynorsk tre

StepLanguageWordMeaning
1Norwegian Nynorsktrethree; tree; wood
2Old Norsetrétree; the mast of a ship; ree, rafter, beam
3Proto-Germanictrewątree
4EnglishdoruAlternative form of dory
5Ancient Greekδόρυwood, tree, stem; spear shaft, spear, lance,...
6Proto-Hellenicdórutree
7Proto-Indo-Europeandórutree
8Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree

via Norwegian Nynorsk grense

StepLanguageWordMeaning
1Norwegian Nynorskgrensea border; a boundary; a limit
2GermanGrenzeborder; limit; frontier
3Middle High Germangrenizeborder; frontier
4Old Polishgranicaborder
5Proto-Slavicgrani̋caborder, boundary, limit, a line that separates things or areas
Every word from Proto-Indo-European drew-Every word from Proto-Indo-European dóruEvery word from Proto-Hellenic dóru