Where does “doírsine” come from?

doírsine (Middle Irish) comes from Old Irish daíre, from Old Irish dáir, from Old Irish daur, from Proto-Celtic daru, from Proto-Indo-European dóru, from Proto-Indo-European drew- — hard, firm, strong, solid; hard, fast; tree.

Ancestry of “doírsine”, step by step

StepLanguageWordMeaning
1Old Irishdaírea forest of oak trees
2Old Irishdáirbulling, heat
3Old Irishdaur—
4Proto-Celticdaruoak
5Proto-Indo-Europeandórutree
6Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree

Words derived from “doírsine”

Every word from Proto-Indo-European drew- →Every word from Proto-Indo-European dóru →Every word from Proto-Celtic daru →