Where does “derbráthair” come from?

derbráthair (Old Irish) comes from Old Irish derb, from Proto-Celtic derwos, from Proto-Indo-European drewh₂-, from Proto-Indo-European dóru, from Proto-Indo-European drew- — hard, firm, strong, solid; hard, fast; tree.

derbráthair (Old Irish): brother

Definitions

  1. brother

Ancestry of “derbráthair”, step by step

derbráthair traces back through two separate lines of ancestry.

via Old Irish derb

StepLanguageWordMeaning
1Old Irishderbsure, certain, fixed, determinate
2Proto-Celticderwosfirm
3Proto-Indo-Europeandrewh₂-steady, firm
4Proto-Indo-Europeandórutree
5Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree

via Old Irish bráthair

StepLanguageWordMeaning
1Old Irishbráthairbrother, cousin, kinsman
2Proto-Celticbrātīrbrother
3Proto-Indo-Europeanbʰréh₂tērbrother

Words derived from “derbráthair”

Every word from Proto-Indo-European drew- →Every word from Proto-Indo-European dóru →Every word from Proto-Indo-European drewh₂- →