This is the 9493rd most frequent Spanish word.
anchura
Width; the measurement or extent of something from side to side.
In this case, 'anchura' is used to denote the road's extent from one side to the other.
La anchura del camino permite que dos coches pasen al mismo tiempo.
The width of the road allows two cars to pass at the same time.
'Anchura' is used to mean 'width', specifically describing the measurement of the river's breadth.
La anchura del río es impresionante.
The width of the river is impressive.
Here, 'anchura' refers to the width of the door, indicating its cross-sectional measurement.