Where does “dearbh-bhriathar” come from?

dearbh-bhriathar (Scottish Gaelic) comes from Scottish Gaelic dearbh, 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.

dearbh-bhriathar (Scottish Gaelic): axiom, dogma, truism

Definitions

  1. axiom, dogma, truism

Ancestry of “dearbh-bhriathar”, step by step

dearbh-bhriathar traces back through two separate lines of ancestry.

via Scottish Gaelic dearbh

StepLanguageWordMeaning
1Scottish Gaelicdearbhsame, very, exact; to try, to test; to prove
2Old Irishderbsure, certain, fixed, determinate
3Proto-Celticderwosfirm
4Proto-Indo-Europeandrewh₂-steady, firm
5Proto-Indo-Europeandórutree
6Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree

via Scottish Gaelic briathair

StepLanguageWordMeaning
1Scottish Gaelicbriathair—
Every word from Proto-Indo-European drew- →Every word from Proto-Indo-European dóru →Every word from Proto-Indo-European drewh₂- →