nesigurno

1. uncertainly; hesitantly
   Odgovorila je nesigurno i pogledala u pod. — She answered hesitantly and looked at the floor.
   Dete još nesigurno hoda. — The child still walks unsteadily.
2. unsafely; unsafe
   Noću je u ovom kraju nesigurno. — It's unsafe in this neighbourhood at night.
3. unsteadily; unreliably
   Merdevine stoje nesigurno, pridrži ih. — The ladder isn't steady, hold it.

In the sense "unsafe" it is often used in the construction nesigurno je.