night safe 
noun British
A safe with access from the outer wall of a bank for the deposit of money or other valuables when the bank is closed.She had parked her Peugeot outside the bank and left the engine running while she used the night safe.
- keep the peace
- keep the pot boiling
- keep (the) score
- keep the wolf from the door
- keep time
- keep to
- keep to oneself
- keep up (also keep up with)
- keep up appearances
- keep up with
- keep up with the Joneses
- keep watch
- keep wicket
- keep your hair on!
- keep your pecker up
- keep your shirt on
- keepy-up
- keepy-uppy
- keeshond
- keester
- keeve
- kef
- Kefallinía
- Kefauver, Estes
- keffiyeh