Where does “horsepower” come from?

Horsepower derives from Middle English horse and Middle English -en, combining Old English -en with Proto-Indo-European ḱers-, originally meaning to run or move swiftly.

horsepower (English): Power derived from the motion of a horse; A...

Definitions

  1. Power derived from the motion of a horse; A...

Ancestry of “horsepower”, step by step

horsepower traces back through two separate lines of ancestry.

via English Power

StepLanguageWordMeaning
1EnglishPowerA button of a computer, a video game console, or...
2Middle EnglishpowerAbility, power or capability
3Anglo-Normanpoer
4Latinpotēre
5Latinpossepresent active infinitive of possum  "to be able...
6Latinpotisable, capable, possible
7Proto-Italicpotismaster, in control of
8Proto-Indo-Europeanpótismaster, ruler; husband
9Proto-Indo-Europeanph₃tis
10Proto-Indo-Europeanpeh₃-to drink

via English HORSE

StepLanguageWordMeaning
1EnglishHORSEA poker variant consisting of five different...
2Middle EnglishhorseAlternative form of hors; Alternative form of...
3Old Englishhorshorse
4Proto-West Germanichrosshorse
5Proto-Germanichrussąhorse
6Proto-Indo-Europeanḱers-to run

Words derived from “horsepower

Every word from Proto-Indo-European peh₃-Every word from Proto-Indo-European ph₃tisEvery word from Proto-Indo-European pótis