This is the 2635th most frequent Spanish word.
directos
Directos: Direct.
Here, 'directos' is used as an adjective describing the trains, emphasizing their feature of having a direct route without stops.
Los trenes directos son más convenientes para viajar sin escalas.
Direct trains are more convenient for traveling without stops.
In this case, 'directos' is used metaphorically to describe the manner of communication as straightforward and clear.
Es mejor ser directos al comunicar nuestras necesidades.
It's better to be direct when communicating our needs.
Again, 'directos' is used as an adjective describing flights, indicating that they go straight to the destination without layovers.