opomena

1. warning; reprimand; rebuke
   Učenik je dobio opomenu zbog izostanaka. — The pupil got a reprimand for missing classes.
   Ovo ti je poslednja opomena! — This is your last warning!
2. (in sports) caution; booking
   Napadač je dobio opomenu u prvom poluvremenu. — The striker was booked in the first half.
3. (of an unpaid bill) payment reminder; overdue notice
   Stigla nam je opomena za struju. — We got an overdue notice for the electricity bill.

Usually used with dobiti and dati: dobiti opomenu, dati nekome opomenu.