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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)
財布が無くなってしまった。
I've lost my wallet.
お金が無くなりそうです。
I'm about to run out of money.
鍵が無くなったので困った。
I'm in trouble because I lost my key.