This is the 14063rd most frequent Spanish word.
tardo
Slow; late; delayed.
In this sentence, 'tardo' is used as a verb in the first-person singular form to mean 'I take a long time'.
Yo tardo en preparar la comida.
I take a long time to prepare the food.
Here, 'tardo' acts as an adjective describing 'autobús' as 'tardy' or taking a long time.
El autobús tardo llegó tarde.
The tardy bus arrived late.
In this instance, 'tardo' is part of a phrase meaning 'I take too long,' showing a slightly different nuance of the verb usage.