This is the 248th most frequent Lithuanian word.
nereikia
"Not needed" or "no need."
In this sentence, 'nereikia' is used to express the lack of necessity for the subject to perform the action of going to the store.
Tau nereikia eiti į parduotuvę.
You don't need to go to the store.
Here, 'nereikia' indicates that the action of speaking loudly is not required at the current moment.
Dabar nereikia garsiai kalbėti.
It is not necessary to speak loudly now.
In this case, 'nereikia' conveys the idea that worrying about minor matters is unnecessary.