This is the 671st most frequent Turkish word.
endişe
Anxiety; worry; concern.
Here, 'endişe' is used as a noun and represents the act or concern of worrying.
Endişe etmene gerek yok, her şey yolunda.
There is no need to worry, everything is fine.
In this sentence, 'endişe' is used again as a noun to denote concerns or apprehensions about something specific.
Bu büyük projeyle ilgili endişelerim var.
I have concerns about this big project.
Here, 'endişe' is part of an adverbial expression ('endişeyle'), illustrating a state of concern or anxiousness.