Where does “dual” come from?

dual (Scottish Gaelic) comes from Old Irish dúal, from Proto-Celtic doklos, from Proto-Indo-European doḱlos.

dual (Scottish Gaelic): hereditary; usual, natural; birthright

Definitions

  1. hereditary; usual, natural; birthright

Ancestry of “dual”, step by step

StepLanguageWordMeaning
1Old Irishdúalsuitable; strand or lock of hair; that which...
2Proto-Celticdokloslock of hair
3Proto-Indo-Europeandoḱlos—
Every word from Proto-Indo-European doḱlos →Every word from Proto-Celtic doklos →Every word from Old Irish dúal →
dual — Etymology, Origin & Word History | Etymology Explorer