To Be Gone
To Run Out, To Be Lost, To Disappear
intransitive verb, godan verb
Here we have nothing, followed by the verb なる. A verb that means "become nothing"? That'll be to be gone, to run out, to be lost, or to disappear.
This can be translated in various ways depending on the situation, but just remember that it always refers to something changing from being there, to not being there.
This uses the kun'yomi reading, which you learned with 無し, so you should be good to go.
すぐ無くなる
to be gone quickly, to run out quickly
もう無くなる
to be gone already, to be gone soon
まったく無くなる
to completely run out
ほとんど無くなる
to be almost gone
お金が無くなる
to run out of money, to lose one's money
時間が無くなる
to run out of time
意味が無くなる
to become meaningless
必要が無くなる
to no longer be necessary
することが無くなる
there will be nothing left to do
あ、トイレットペーパー、もうすぐ無くなるよ。
Oh, our toilet paper is almost gone.
することが無くなっちゃって、ヒマなんだよね。
I've run out of things to do and I'm bored.
カード社会では、現金を持つ必要がほぼ無くなった。
In a credit card society, the need to carry cash has almost disappeared.