zinuti

1. to open one's mouth; to gape
   Zini, da ti pogledam grlo. — Open your mouth so I can look at your throat.
   Zinuo je od čuda kad je video novi auto. — He gaped in amazement when he saw the new car.
2. colloq. (usually with negation) to say a word; to open one's mouth
   Pred šefom nije smeo ni da zine. — He didn't dare say a word in front of the boss.
3. (of a hole, crack) to gape open; to yawn
   Posle zemljotresa je na putu zinula velika pukotina. — After the earthquake a huge crack gaped open in the road.
4. colloq. (zinuti na nešto, greedily) to set one's sights on something; to covet
   Čim je čuo za nasledstvo, zinuo je na kuću. — As soon as he heard about the inheritance, he set his sights on the house.
5. colloq. (zinuti na nekoga, shouting) to snap at someone; to shout at someone
   Zinuo je na mene čim sam ušao u kancelariju. — He snapped at me as soon as I walked into the office.

In the sense 'say a word' it usually appears in the construction "ni da zine".