This is the 942nd most frequent Finnish word.
vastannut
"Vastannut" means "answered" or "responded" in English.
Here, 'vastannut' is used in the context of a present perfect question about whether the action of responding has occurred.
Oletko vastannut opettajan sähköpostiin?
Have you responded to the teacher's email?
In this example, 'vastannut' occurs in a temporal clause and shows completion of the action of answering before another event.
Kun Maria oli vastannut, keskustelu jatkui.
After Maria had answered, the discussion continued.
In this sentence, 'vastannut' signifies a past perfect action where someone has responded or not responded to something.