This is the 444th most frequent Spanish word.
kilómetros
"Kilómetros" means "kilometers," a unit of distance equal to 1,000 meters.
In this sentence, 'kilómetros' is used as a unit of distance to describe how far they traveled.
Recorrimos veinte kilómetros en bicicleta ayer.
We cycled twenty kilometers yesterday.
Here, 'kilómetros' is used to express the measurement of the road's length.
La carretera mide cien kilómetros en total.
The road is one hundred kilometers long in total.
In this example, 'kilómetros' specifies the remaining distance to the destination.