Where does “contrarotating” come from?

contrarotating (English) comes from English rotating, from English rotate, from Latin rotātus, from Latin rotō, from Latin Rota, from Proto-Italic rotā, from Proto-Indo-European Hróth₂-eh₂, from Proto-Indo-European Hreth₂- — to run.

contrarotating (English): Rotating in two directions by contrarotation

Definitions

  1. Rotating in two directions by contrarotation

Ancestry of “contrarotating”, step by step

contrarotating traces back through two separate lines of ancestry.

via English rotating

StepLanguageWordMeaning
1Englishrotatingundergoing physical rotation; that proceeds in...
2EnglishrotateTo spin, turn, or revolve; To advance through a...
3Latinrotātusrevolved
4Latinrotōto turn, trend, wheel, roll, swing about, whirl, rotate; brandish
5LatinRotaan ecclesiastical appellate court in the Catholic...
6Proto-Italicrotā
7Proto-Indo-EuropeanHróth₂-eh₂
8Proto-Indo-EuropeanHreth₂-to run

via English Contra

StepLanguageWordMeaning
1EnglishContraA member of any of various rightist guerrilla...
2Latincontrāagainst
3Latinubīwhere? in what place?, in which place?
4Latincubī
5Proto-Italic*kʷuðeiwhere
Every word from Proto-Indo-European Hreth₂-Every word from Proto-Indo-European Hróth₂-eh₂Every word from Proto-Italic rotā