preferisteis
Preferisteis is the second-person plural form of the Spanish verb preferir in the pretérito indefinido (simple past). It means “you all preferred” and is used mainly in Spain, where the vosotros form is standard. In most Latin American varieties, the corresponding form is “ustedes prefirieron.”
Conjugation notes: Preferir is an irregular -ir verb with an e → i stem change in the pretérito
Usage: It describes a past preference by a group. It can appear in declarative statements or questions,
Regional note and related forms: In Spain, preferisteis is common; in Latin America, the corresponding form