Proponían
Proponían is a Spanish verb, the imperfect indicative form of the verb "proponer." This verb translates to "to propose," "to suggest," or "to put forward" in English. The imperfect tense in Spanish, "proponían," indicates an ongoing or habitual action in the past, or a description of a past situation. Therefore, "proponían" suggests that "they were proposing," "they used to propose," or "they proposed" (in a habitual or descriptive sense).
When used in a sentence, "proponían" would describe a past scenario where one or more subjects were