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To become useless, ruined, or no longer functional.
この機械は駄目になってしまった。
This machine has become useless.
彼の健康は駄目になってしまった。
His health has been ruined.
This phrase is often used to describe something that has lost its value or functionality.
This phrase is often used to describe objects, plans, or situations that have become useless or ruined.
The meaning can vary slightly depending on the context, such as describing a broken object or a failed plan.
From 駄目 (dame, meaning 'useless' or 'no good') + なる (naru, meaning 'to become').
This phrase is commonly used in both formal and informal contexts to describe something that has become useless or ruined.