zbunjivati

1. to confuse; to puzzle; to baffle
   Ova uputstva me stalno zbunjuju. — These instructions keep confusing me.
   Ne zbunjuj dete tolikim pitanjima. — Don't confuse the child with so many questions.
2. (zbunjivati se) to get confused; to get flustered
   Uvek se zbunjuje kad treba da govori pred ljudima. — He always gets flustered when he has to speak in front of people.

The perfective is zbuniti; zbunjivati describes repeated or ongoing confusion.