ellos peleaban

they were fighting

→ pelear
pele fight + aban 3rd-person plural imperfect (indicative or subjunctive)
verb · third plural · imperfect indicative Rare #37,177
they were fighting Imperfect tense; describes an ongoing/repeated action in the past.
SP: Los niños peleaban por el juguete.
EN: The kids were fighting over the toy.
Conjugation of pelear
Indicative imperfect
SingularPlural
First — peleábamos
Third — peleaban
Subjunctive imperfect
SingularPlural
First — peleábamos
Third — peleaban

Daniel Maleski dice que se iba cuando sus padres se peleaban.

Daniel Maleski says he would leave when his parents fought.

— Anatomía de una caída (2023)

Las dos hermanas siempre peleaban entre sí.

The two sisters were always fighting with each other.

Ahora, el centro del Club de la Lucha eran sólo los dos hombres que peleaban.

Now, the focus of Fight Club was only on the two men who were fighting.

— El club de la lucha (1999)

Si dos se peleaban por una tontería, en menos de nada uno estaba muerto.

If two people got into a fight over something stupid, before you knew it, one of them was dead.

— Uno de los nuestros (1990)

La mamá separó a los niños que peleaban.

The mother separated the fighting children.

Ella no podía entender por qué se peleaban.

She couldn't understand why they were fighting.

Tom y Mary peleaban como perro y gato.

Tom and Mary fought like cats and dogs.