advirtieron
-they warned
The word advirtieron is the preterite form of advertir in the third person plural.
See the full advertir conjugation

advertir

Nos advirtieron acerca de ese viento, pero no escuchaste.
They warned us of that wind, but you didn't listen.
A continuación les advirtieron que no cooperasen con las autoridades.
Then they warned them not to cooperate with the authorities.
Me advirtieron que eras el jefe de esta operación.
They warned me, you're the boss of this operation...
Quiero decir, tu hermano y Thayer, te lo advirtieron.
I mean, your brother and Thayer, they all warned you.
Supongo que tus padres te advirtieron de los extraños.
I suppose that your parents they noticed you of the strangers.
Me advirtieron lo que podría hallar en este bosque, pero...
I was warned what I might find in these woods, but...
Ellos advirtieron del serio problema que podría ocurrir allí.
They warned of the serious trouble which might befall him there.
Lo siento, mis abogados me advirtieron de no poner nada por escrito.
Sorry, my lawyers advised me not to put anything in writing.
Sus hombres le advirtieron que no confiara en mi.
His men warned him not to trust me.
Los autores advirtieron que los hallazgos son de carácter experimental.
The authors cautioned that the nature of the findings is experimental.
Los libros de marionetas no me advirtieron sobre esto.
The puppet books didn't warn me about this.
No, esto es exactamente, exactamente de lo que los comerciales me advirtieron.
No, this is exactly, exactly what the commercials warned me about.
Ellos advirtieron a a-Pipi, pero a-Pipi no les creyó.
They tried to warn a-the Pipi, but a-Pipi not believe them.
Los ingenieros advirtieron de un posible colapso total.
Engineers have warned of a possible complete collapse.
Sin embargo, algunos advirtieron que las remesas podían crear dependencia entre los receptores.
However, some of them warned that remittances could create dependency among recipients.
Nos advirtieron que ustedes estaban a unos kilómetros.
They warned us that you were a few kilometers from here.
Los científicos californianos nos advirtieron del cambio climático hace 30 años.
California's scientists warned us 30 years ago about climate change.
Mi familia, mis amigos, todos me advirtieron que no confiara en ti.
My family, my friends, they all warned me not to trust you.
¿Por qué los sensores no nos advirtieron a tiempo?
Why didn't sensors warn us in time?
Los médicos le advirtieron de este comportamiento.
The doctors warned you about this kind of behavior.
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