Where does “dual-voltage” come from?

dual-voltage (English) comes from English voltage, from English volt, from French volte, from Italian volta, from Vulgar Latin volta, from Latin volatus, from Latin volō, from Proto-Italic gʷelāō — to throw, reach, pierce; to hit by throwing.

dual-voltage (English): Able to run using two different voltages, depending on the voltage supplied to the particular railway line, whether by third rail direct current or overhead wires

Definitions

  1. Able to run using two different voltages, depending on the voltage supplied to the particular railway line, whether by third rail direct current or overhead wires

Ancestry of “dual-voltage”, step by step

dual-voltage traces back through two separate lines of ancestry.

via English voltage

StepLanguageWordMeaning
1EnglishvoltageThe difference in electrostatic potential between...
2EnglishvoltIn the International System of Units, the derived...
3Frenchvolte
4Italianvoltatime, instance, occasion; turn; vault
5Vulgar Latinvoltanominative/accusative/vocative plural of voltum
6Latinvolatusflown, having been flown; flying; flight
7Latinvolōto wish, to please
8Proto-Italicgʷelāō
9Proto-Indo-Europeangʷelh₁-éh₂-ye-tito throw, raise the arm
10Proto-Indo-EuropeangʷelH-to throw, reach, pierce; to hit by throwing

via English dual

StepLanguageWordMeaning
1EnglishdualCharacterized by having two (usually equivalent) components
2Latinduālisdual
3Latinduōtwo; 2
4Proto-Italicduōtwo
5Proto-Indo-Europeandwóh₁two
Every word from Proto-Indo-European gʷelH-