štednja

1. saving; economizing; austerity
   Vlada je najavila nove mere štednje. — The government announced new austerity measures.
   Štednja struje je važna tokom zime. — Saving electricity is important in winter.
2. (money set aside) savings; savings deposit
   Imam nešto devizne štednje u banci. — I have some foreign-currency savings in the bank.
   Oročio sam štednju na godinu dana. — I put my savings in a one-year term deposit.
3. (putting money aside) saving money; putting money aside
   Počeli smo štednju za novi stan. — We've started saving for a new flat.

What is being saved goes in the genitive: štednja vode, štednja energije.