kontati

1. slang to get; to understand
   Kontaš li ti šta ja pričam? — Do you get what I'm saying?
   Ništa ne kontam iz ove matematike. — I don't get this math at all.
2. slang to think; to reckon; to figure
   Kontam da će on ipak doći. — I reckon he'll come after all.
   Ceo dan kontam kako da mu to kažem. — I've been figuring all day how to tell him.

The very frequent «kontaš?» means "you get it?"; for a single moment of realizing, use «skontati».