An axle or the transverse bar that supports wheels in a vehicle, likely from confusion or regional variation of 'axletree.'
From 'axe' (axis) blended with 'tree' (originally meaning wood or pole), or possibly a variant of 'axletree' used regionally in Middle English.
This word shows how people in different regions would describe the same object differently—if you'd never seen a written standard, you'd just describe it as 'the tree-like rod the wheels turn on.'
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