gorak

1. (of taste) bitter
   Kafa je previše gorka, daj mi šećer. — The coffee is too bitter, pass me the sugar.
   Više volim gorku čokoladu od mlečne. — I prefer dark chocolate to milk chocolate.
2. bitter; painful
   To je gorka istina, ali moraš je prihvatiti. — It's a bitter truth, but you have to accept it.
   Iz tog braka izašla je sa gorkim iskustvom. — She came out of that marriage with a bitter experience.

"Gorka čokolada" means dark chocolate.