prestrašiti

1. (+ acc.) to frighten; to scare
   Prestrašio si me, nisam te čula! — You scared me, I didn't hear you!
   Grmljavina je prestrašila decu. — The thunder frightened the children.
2. (prestrašiti se) to get scared; to be frightened
   Pas se prestrašio od vatrometa. — The dog got scared of the fireworks.
   Nemoj da se prestrašiš, to je samo vetar. — Don't be scared, it's just the wind.

With se, the cause of fear is expressed by the genitive (prestrašiti se nečega), less often with od + genitive (prestrašiti se od nečega).