utrošiti

1. (of money, time) to spend
   Utrošio sam ceo dan na papirologiju. — I spent the whole day on paperwork.
   Za renoviranje smo utrošili sva ušteđena sredstva. — We spent all our savings on the renovation.
2. (of energy, resources) to use up; to consume
   Prošlog meseca smo utrošili mnogo struje. — We used a lot of electricity last month.
   Auto je na putu do Niša utrošio pola rezervoara. — The car used up half a tank on the way to Niš.

What it is spent on takes na + acc.: utrošiti novac na stan.