köken: From Middle High German rat, from Old High German rad, from Proto-West Germanic *raþ, from Proto-Germanic *raþą, from Proto-Indo-European *Hret- (“to roll”). Related to Swedish ratt (“steering wheel”) and Finnish ratti (“steering wheel”). Also related to English rotary and Spanish rueda (“wheel”), which descended from the same PIE root through Latin rota.
aile: Essen auf Rädern, Rad fahren, Radarm, Radber, radeln, radfahren, Radhaube, radial, Radkappe, Radler
köken: Inherited from Old French ruee, from earlier rode, from Latin rota. The current form may have been influenced by rouer and rouelle. Doublet of rote, a borrowing from Medieval Latin.
aile: cinquième roue du carrosse, grande roue, la roue tourne, mettre des bâtons dans les roues, patin à quatre roues, patinage à roues alignées, réinventer la roue, rouage, roue de secours, se mettre dans la roue
Une roue de vélo (bike wheel), une roue de secours (spare wheel)
Roue de moulin: mill wheel.
Roue dentée (or engrenage): toothed wheel, cogwheel