This is the 10938th most frequent Spanish word.
dieran
"Dieran" is the third-person plural form of the imperfect subjunctive of "dar," meaning "they gave" or "they might give."
In this sentence, "dieran" is used in the imperfect subjunctive mood to express a hypothetical situation that is conditional on another event.
Si sus amigos le dieran un consejo, debería escucharlo.
If their friends gave them advice, they should listen to it.
Here, "dieran" is used in a subordinate clause requiring the past subjunctive mood to indicate uncertainty or doubt.
No pensábamos que ellos nos dieran más tiempo para completar el proyecto.
We didn't think they would give us more time to complete the project.
In this context, "dieran" is again in the imperfect subjunctive, used to express necessity or importance in a past concept depending on the subject action.