nepotrebno

1. unnecessarily; needlessly
   Nepotrebno si se nervirao zbog toga. — You got worked up over that for nothing.
   Ne troši nepotrebno novac. — Don't spend money needlessly.
2. (in nepotrebno je) there's no need; it's unnecessary
   Nepotrebno je da dolaziš ranije. — There's no need for you to come early.