razočaranje

1. disappointment; disillusionment
   Nije mogla da sakrije razočaranje kad je čula rezultat. — She couldn't hide her disappointment when she heard the result.
   Posle razočaranja u ljude, povukao se u sebe. — After becoming disillusioned with people, he withdrew into himself.
2. (of a person or thing) a disappointment; a letdown
   Novi film je pravo razočaranje. — The new film is a real letdown.

Disappointment in someone/something: razočaranje u + accusative.