This is the 8919th most frequent Spanish word.
transmilenio
A bus rapid transit system in Bogotá, Colombia.
In this case, 'Transmilenio' is indicating the service itself, describing the experience of using it.
El Transmilenio fue muy lleno durante la hora pico.
The Transmilenio was very crowded during rush hour.
In this sentence, 'Transmilenio' refers to the specific bus rapid transit system used as a mode of transportation.
Ayer tomé el Transmilenio para llegar al centro.
Yesterday, I took the Transmilenio to get to the downtown.
Here, 'Transmilenio' is mentioned in the context of its design and infrastructure being noteworthy.