This is the 14068th most frequent Spanish word.
taxi
A car for hire to transport passengers to a destination.
In this sentence, 'taxi' is used as a noun referring to the vehicle used for paid transportation.
Tomé un taxi para ir al aeropuerto.
I took a taxi to go to the airport.
Here, 'taxi' is again a noun, used in the context of requesting the service of transportation.
¿Puedes llamar un taxi por mí?
Can you call a taxi for me?
In this example, 'taxi' is still a noun, used as the direct object of the verb, indicating the type of vehicle learned to be driven.