-you were fighting
The word peleabais is the imperfect form of pelear in the second person plural.
See the full pelear conjugation


¿Por qué os peleabais?
Why do you quarrel with one another?
Porque os peleábais todo el tiempo.
Because you fought all the time.
Vosotros peleabais, pero papá y yo estábamos bien.
You guys fought, but Dad and I were fine.
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