This is the 3576th most frequent Spanish word.
irresponsable
Not responsible; careless or reckless.
In this sentence, 'irresponsable' is used as an adjective to describe a general action or behavior that lacks responsibility.
Es irresponsable dejar las luces encendidas después de salir.
It is irresponsible to leave the lights on after leaving.
Here, 'irresponsable' is used to describe a person's specific action that reflects a lack of responsibility.
Juan fue irresponsable al no entregar el proyecto a tiempo.
Juan was irresponsible for not submitting the project on time.
In this sentence, 'irresponsable' reflects judgment towards an activity that demonstrates a lack of responsibility in its consideration.