razuveriti

1. (someone) to talk out of; to disabuse
   Pokušala sam da ga razuverim, ali nije hteo da sluša. — I tried to talk him out of it, but he wouldn't listen.
   Lekar ju je razuverio: bolest nije ozbiljna. — The doctor set her straight: the illness isn't serious.
2. (razuveriti se u + acc.) to lose faith; to become disillusioned
   Mnogi su se razuverili u obećanja političara. — Many people have lost faith in politicians' promises.
   Brzo se razuverio u tu ideju. — He quickly gave up on that idea.

The imperfective is razuveravati.