Fetching details from the dictionary...

to be lost (e.g. luggage); to be missing
to be used up; to be run out; to be exhausted; to be consumed; to be reduced to zero; to not occur any more
to disappear (e.g. pain); to be lost (e.g. a dream, confidence)
財布がなくなりました。
My wallet is missing.
鍵がなくなって困っています。
I'm troubled because my keys are lost.
冷蔵庫に入れておいたケーキがなくなっていた。
The cake I put in the fridge was gone.