This is the 6324th most frequent Polish word.
brakuje
"Brakuje" means "is missing" or "lacks."
The word 'brakuje' here is used to express the absence or deficiency of an entity, specifically 'time' ('czasu').
Brakuje nam czasu na dokończenie projektu.
We are lacking time to finish the project.
In this case, 'brakuje' indicates that the essay 'is missing' or 'does not have' important elements—key arguments.
W Twoim eseju brakuje kluczowych argumentów.
Your essay lacks key arguments.
Here, 'brakuje' signifies the need for an additional person to achieve a required number, emphasizing incompleteness.