zbuniti

1. to confuse; to baffle; to puzzle
   Njegovo pitanje me je potpuno zbunilo. — His question completely confused me.
   Zbunili su nas različiti putokazi. — The different signposts confused us.
2. (zbuniti se) to get confused; to become flustered
   Zbunio sam se i zaboravio šta sam hteo da kažem. — I got flustered and forgot what I wanted to say.

The imperfective is zbunjivati; "confused" is zbunjen.