spekulirati

1. Croat. (o + loc.) to speculate
   Mediji danima spekuliraju o njegovoj ostavci. — The media have been speculating about his resignation for days.
   Ne želim spekulirati o rezultatu. — I don't want to speculate about the result.
2. Croat. (of trading) to speculate
   Godinama je spekulirao nekretninama i zaradio mnogo novca. — For years he speculated in real estate and made a lot of money.

In Serbia the word is spekulisati.