brkati

1. to mix up; to confuse
   Stalno brkam imena njihove dece. — I keep mixing up their kids' names.
   Mnogi brkaju Slovačku i Sloveniju. — Many people confuse Slovakia and Slovenia.
2. dated (brkati se u + acc.) to meddle; to interfere
   Nemoj da se brkaš u moj posao. — Don't meddle in my business.

The perfective is pobrkati; to confuse one thing with another: brkati nešto s nečim. Reflexive brkati se 'to meddle' is rare today; the usual verbs are mešati se u or petljati se u.