This is the 16161st most frequent Turkish word.
vermişlerdir
"Vermişlerdir" means "They have given."
The word "vermişlerdir" here implies a completed action in the context of the present, suggesting that they have completed the action of giving.
Onlar bugün bana bazı belgeler vermişlerdir.
They have given me some documents today.
In this context, "vermişlerdir" is used to hypothesize about a past event connected to a probable outcome.
Arkadaşlar bir hediye hazırlamış ve size sunmuş olabilirler; bu durumda hediyeyi vermişlerdir.
Friends might have prepared a gift and presented it to you; in this case, they have given it.
Here, "vermişlerdir" indicates a formal tone and emphasizes the completion of the decision process.