noun
vault
VAWLT/vɔːlt/
A strongly protected room for storing valuables.
The bank keeps cash and gold in a locked vault.

Etymology
Latin volvere, “to turn,” lies behind the image of a bowed or arched roof. Vault also named an underground arched chamber; that chamber sense continues in the secure room used for valuables.
In context
the woodpecker's safe deposit boxes finding the absolutely perfect little vault for every acorn can be quite the puzzle each hole has been drilled to fit a certain nut shape
More examples
- The jeweler stores the diamonds in a vault overnight.
- Only authorized employees can enter the vault.
- The museum's vaults protect rare coins and valuable manuscripts.
Forms
vault · vaults
Similar words
- safe
- Usually a secure container rather than an entire room.