This is the 11886th most frequent Spanish word.
hubieran
"Hubieran" is the third-person plural form of the past subjunctive of "haber," meaning "they/you (plural) would have."
This usage of 'hubieran' is part of a past conditional tense, used to discuss hypothetical situations in the past.
Si ellos hubieran llegado a tiempo, podrían haber visto la película.
If they had arrived on time, they could have seen the movie.
In this sentence, 'hubieran' expresses a condition that did not happen but is imagined for the sake of comparison or discussion.
Si hubieran estudiado más, habrían aprobado el examen.
If they had studied more, they would have passed the exam.
Here, 'hubieran' is used in an expression of a past wish or regret about an unrealized event.