axle

/ˈæk.səl/
noun
  1. A rod or shaft that connects a pair of wheels and allows them to turn together.
    • The truck's axle was so heavy that it took two people to lift it.
    • The car's rear axle broke after hitting a large pothole.
    • A bicycle's axle needs to be greased regularly to keep the wheels spinning smoothly.
  2. A central shaft for a rotating machine or gear.
    • The motor's axle turned the conveyor belt at a steady speed.
    • He replaced the worn axle in the lawnmower's blade assembly.
    • The wind turbine's axle connects the blades to the generator.
Synonyms
What does "axle" mean? | whatsthatwordmean | whatsthatwordmean