trezor

1. safe; vault
   Nakit držimo u trezoru u spavaćoj sobi. — We keep the jewellery in a safe in the bedroom.
   Lopovi su pokušali da provale u trezor banke. — The thieves tried to break into the bank vault.
2. (in public finance) treasury
   Plate se isplaćuju preko Uprave za trezor. — Salaries are paid through the Treasury Administration.

For a small home safe, sef is more usual; trezor often means a bank vault.