C2 adjective /ˌpluːˈpɜːrfɪkt/
pluperfect
pluscuamperfecto
Meaning
a verb tense expressing an action completed before another past action
Example
By the time she arrived, he had finished his homework, showing the pluperfect tense.
Para cuando ella llegó, él ya había terminado su tarea, mostrando el tiempo pluscuamperfecto.