začuditi

1. to surprise; to astonish
   Njegov odgovor me je baš začudio. — His answer really surprised me.
2. (začuditi se) to be surprised; to wonder
   Začudila sam se kad sam videla cenu. — I was surprised when I saw the price.
   Niko se nije začudio njegovoj odluci. — Nobody was surprised by his decision.

Začuditi se takes the dative: začudio se tome, "he was surprised at that".