arruinaban
Arruinaban is the third-person plural imperfect indicative form of the Spanish verb "arruinar." The verb "arruinar" generally translates to "to ruin," "to spoil," "to destroy," or "to bankrupt." Therefore, "arruinaban" describes an ongoing or habitual action in the past where "they" (or "you" plural formal) were ruining, spoiling, destroying, or bankrupting something.
The imperfect tense is used to describe actions that were happening over a period of time in
The specific meaning of "arruinaban" depends heavily on the context of the sentence in which it appears.