axle
UK: ˈæksl̩ | US: ˈæksəl
n. the central shaft or rod on which a wheel or pair of wheels rotates
The word "axle" traces back to Old English eaxl, meaning "shoulder" or "axis," reflecting its role as a central supporting structure. It shares roots with Latin axis (pivot, axle) and Greek axon (axis), emphasizing the concept of rotational support. The suffix -le likely functions as a diminutive or instrumental marker, common in Germanic languages. Over time, "axle" specialized to refer specifically to wheel shafts, retaining its core idea of a pivotal axis.
The wagon's axle broke under the heavy load.
Grease the axle to reduce friction between the wheels.
A squeaky noise indicated the axle needed maintenance.
The mechanic replaced the damaged axle with a reinforced one.
Bicycle axles must align perfectly for smooth riding.