uzvratiti

1. to return; to reciprocate
   Nasmejala mi se, a ja sam joj uzvratio osmeh. — She smiled at me, and I returned her smile.
   Kako da ti uzvratim uslugu? — How can I return the favour?
2. to hit back; to retaliate
   Udario ga je, ali on nije uzvratio. — He hit him, but he didn't hit back.
   Gosti su uzvratili golom u poslednjem minutu. — The visitors hit back with a goal in the last minute.
3. to reply; to retort
   „Nije tvoja stvar“, uzvratila je ljutito. — "It's none of your business," she retorted angrily.

The person is in the dative and the thing returned in the accusative: uzvratiti mu osmeh, uzvratiti poziv.