The word enviaban is the imperfect form of enviar in the third person plural.
See the full enviar conjugation

enviar

Cuando estaba en el ejército, nos enviaban a Siria.
When I was in the military, we go to Syria.
No, que enviaban anticuado, pero mucho más inteligente que los demás.
No, you arent old-fashioned but much more intelligent than others.
Que nos enviaban a Polonia para vivir allí.
That we would be sent to Poland to live there.
Se la llevaron diciendo que enviaban un coche de casa.
They took her saying that we have sent a car from home.
Cada vez que ustedes enviaban una partícula, ellos se fortalecían.
They got stronger every time you sent up a particle.
El dinero que enviaban a casa estimulaba nuestras economías.
The money they sent home supported our economies.
Hace unos años, enviaban a los niños así a reformatorios.
A few years ago, boys like that were committed to institutions.
Es un lugar donde enviaban a la gente para que mejorara.
It's a place where people were sent to try and get better.
Los ataques ocasionales contra los repatriados enviaban un mensaje negativo a los serbios.
Occasional attacks on returnees sent a negative message to the Serbs.
Hace un tiempo me enviaban tarjetas de cumpleaños.
They sent me birthday cards for a while.
La enviaban a la universidad para hacer estudios de maestra.
She was being sent here to college to become a teacher.
En los viejos tiempos, se enviaban cartas.
You know, in the old days, we used to send letters.
Tenía la impresión de que la enviaban para espiarme.
I was under the impression that you were sent to spy on me.
Nos enviaban materias primas muy caras, que nuestra fábrica no necesitaba.
Very expensive raw materials were sent to us which our factory did not require.
Quiero saber qué le enviaban.
I want to know what they were sending him.
Nunca enviaban nada a través de internet.
They never send anything over the internet.
¿Así que sabía adónde me enviaban?
So he knew where I was being sent?
A veces también me enviaban cartas de odio a la dirección de mi casa.
Sometimes hateful letters were also sent to my home address.
Los enviaban a todo Estados Unidos.
Used to ship 'em all over the United States.
¡Sí, y luego seguro que te enviaban a un campamento todo el verano!
Yeah, and then I bet you get... Sent off to camp all summer!
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