Where does “dual” come from?

Dual comes from Latin dualis, the adjectival form from Latin -alis added to a root from Proto-Indo-European dwóh₁, meaning two.

dual (English): Characterized by having two (usually equivalent) components

Definitions

  1. Characterized by having two (usually equivalent) components

Ancestry of “dual”, step by step

StepLanguageWordMeaning
1Latinduālisdual
2Latinduōtwo; 2
3Proto-Italicduōtwo
4Proto-Indo-Europeandwóh₁two

Words derived from “dual”

Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Italic duō →Every word from Latin duō →