The word susurraban is the imperfect form of susurrar in the third person plural.
See the full susurrar conjugation

susurrar

Me imagino sobre qué tipo de cosas susurraban.
Yes, I can imagine what sort of things they whispered about.
Me imagino sobre qué tipo de cosas susurraban.
Yes, I can imagine what sort of things... they whispered about.
Los espíritus le susurraban como un amigo perdido, y él les escuchaba.
The spirits whispered to him like a lost friend, and he listened to them.
Te vi, susurraban y las bromas.
I saw you. Your whispers and jokes.
Ellos susurraban en los oídos a la gente.
They whispered into people's ears.
Sí, pude oír cómo sus hombres susurraban sus planes de un lado para el otro.
Yeah, I could hear your men whispering their plans back and forth.
Los árboles de Vallespir susurraban en el lenguaje de las hojas y del viento contándose secretos.
The trees of Vallespir whispered in the language of the leaves and the wind telling one another secrets.
El patio estaba en plena tiniebla cuando giraron hacia él y las hojas de los álamos que lo rodeaban susurraban suavemente.
The yard was quite dark as they turned into it and the poplar leaves were rustling silkily all round it.
Sin embargo, también constatamos lo frágil que puede ser el proceso democrático cuando algunas personas nos susurraban «¡no se vayan, por favor!» a la salida de los colegios electorales.
We also, however, saw how fragile the democratic process can be, with people whispering ‘please don’t go!’ to us as we left the polling stations.
Y todos los animales del bosque tenían miedo de la casa porque pensaban que la casa estaba encantada... "Las empleadas entran, pero nunca salen", susurraban en la calle....
And all the animals in the forest were scared of the house 'cause they thought that the house was haunted, and so did all the villagers in the small hamlet of Hartfordshireville.
Las hojas susurraban con el viento que las hacía volar.
The leaves rustled as the wind blew them about.
Las hojas del libro junto a la ventana susurraban con la brisa.
The pages of the book next to the window were rustling in the breeze.
Los alumnos susurraban y se movían de acá para allá cuando entró la profesora.
The students were whispering and moving about when the teacher came in.
Los alumnos susurraban y se movían de acá para allá cuando entró la profesora.
The students were whispering and moving around when the teacher came in.
Los estudiantes susurraban y se estaban moviendo de acá para allá cuando entró la profesora.
The students were whispering and moving round when the professor came in.
Susurraban mucho, pero a veces también gritaban.
They whispered a lot, but sometimes, they'd also scream.
Want to Learn Spanish?
Spanish learning for everyone. For free.
SpanishDict Premium
Have you tried it yet? Here's what's included:
Cheat sheets
No ads
Learn offline on iOS
Fun phrasebooks
Learn Spanish faster
Support SpanishDict